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TRAFFIC SIGNAL DESIGN GUIDELINES Index of Standard Drawings

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					                  TRAFFIC SIGNAL DESIGN GUIDELINES

                            Index of Standard Drawings

Drawing No.                   Title                                     Sheets   Date

   S-51.0     Typical Location of Traffic Signal Standards                 1     01-31-02
   S-55.0     Typical Layout for Activated Pedestrian Warning Device       1     06-24-10
   S-60.0     Fire Station Warning Beacons                                 1     01-30-06
   S-65.0     Mastarm Signal Head Placement                                2     01-30-06
   S-70.0     Limit Line Inductive Loop Detector Placement                 2     06-24-10
   S-73.2     Accessible Pedestrian Signal (APS)                           1     06-24-10
   S-75.0     Special Detector Applications                                6     03-03-09
   S-85.0     Application of Visibility-Limited Traffic Signal Heads      11     01-30-06
   S-100.0    Operation and Design of Signalized Jogged Intersections     12     06-24-10
   S-101.0    Typical Traffic Signal Layouts                               8     06-24-10
   S-102.0    Mastarm Signal Head Installation Criteria                    1     11-13-98
   S-103.0    Criteria for 12" Signal Heads                                1     03-27-08
                                                                                                                         *
                                                                                                 R                  A




                                                                         3'
                                                                                                50'               20'
         Crosswalks aligned                                                                     45'               17'
         per S-490.0
                                                                                                40'               13'

                                                                                                35'               10'
                                                                        A                       30'                 6'

                                                                                                25'                 2'

                                                                                                20'                 0'




                                                                  R
                                                                                                15'                 0'


                                 3'                                                     * Adjust distance A so that
                                          Install           at                            any pedestrian pushbutton
                                          crosswalk              line                      is within 5' of crosswalk line.
                                          or     limit       line                          If this is not feasible, then a
                                                                                           Type 7 pole is to be used.


                                       10' Minimum where
                                       feasible        if   median
                                       signal is necessary


                                       Raised     median




                                                                             Generally; install along the curb face
                                                                             prolongation. The locations may be
                                                                             adjusted to satisfy cone-of-visibility
              3'




                                                       3'




                                                                             requirements, to avoid below-ground
                                                                             obstructions, or to ensure that any
                                                                             pedestrian pushbutton is within 5' of
                                                                             the crosswalk line. If the selected pole
                                                                             location is not within 5' of the crosswalk
                                                                             line, then a Type 7 pole is to be provided
                                                                             for a pedestrian pushbutton. Mastarm
                                                                             locations should be a minimum of 50'
                                                                             downstream of the approach stop line.
                                                                             When this is not feasible, a shorter
                                                                             distance consistent with the requirements
   See    detail                            See         detail
                                                                             of the MUTCD, Section 4D.15, may be
                                                                             used.
   above                                    above




Note:   For   these   and    other                                                     Title
                                            DWN                  MT         01-23-02
intersection alignments not                                                                                                           1
                                            CKD                                          Typical Location of Traffic                      1
depicted above, the distance
between   the      center   of   the        T.    E.                                         Signal Standards
pole to the curb face shall                 Sr.    T.       E.   TLJ        01-29-02                 CITY   OF   LOS    ANGELES
be 3', unless otherwise                     Pr.    T.       E.   GO         01-30-02     DEPARTMENT          OF    TRANSPORTATION
shown on plan.
                                            Approved                                                    1-31-2002       Drawing No.

                                                                                                                             S-51.0
                                                 for             Frances T. Banerjee, General Manager
            Flashing beacon
                                                                                                                                      PED PED
            activated by pedestrian push button

Notes:                                                                                                      W11-2                     XING XING
1. The flash pattern utilizes LED heads
            and              a     Model         2070         controller.     There        are

            60 flash periods per minute. The flash
            period for each beacon includes three
            pulses within 0.5 seconds and a pause
            of 0.5 seconds. The pulses of one
            beacon alternate with the pause of the
            other beacon, as shown below.
                                                         W
2. Flash length                                  is             seconds
                                                        3.5
                   and        retimes            with     each       call.

3. See S-481.0 for required
   advance signing, pavement
   marking, and red curb.                                                                                         R1-5

                                                                                                                R9-3a's                                                      R9-3a's
4. At school crossings, school
                                                                                                                R9-3b's                                                      R9-3b's
   related signs and pavement
   markings shall be used in
                                                                                                                                                                                    R1-1
   place of those shown hereon,
   as per S-481.0.

                                     36"
                       42"




                                                              W11-2(mod)                                                                              Detail"A"
                                                                                                           R1-1
                                                                                                                                       FL.Y   FL.Y


                                                                                                          R62E(CA)                                                            R62E(CA)
                                                              W16(mod)                                            PPB
                                                                                                                                                                              PPB
                                                                                                      W11-2's &                                                              W11-2's &




                                                                                                                                                                                           30'
                                                                                                                                     Detail"A"
                               Detail "A"                                                                  W16-7p's                                    FL.Y   FL.Y           W16-7p's
                                                                                                                     20'                                                      20'
                                            Duty                                                                Mastarm                                                     Mastarm
                                            Cycle
 Pulse Intensity




                                          On      Off                                                                                                                         R1-5
                                          0.1     0.1

                                                                     Beacon        One




               0             0.1    0.2         0.3     0.4    0.5    0.6    0.7    0.8        0.9        1.0
                                                                                                          sec
                         Time
 Pulse Intensity




                                                                                                                                                  W

                                    Beacon              Two



                                                                                                                                                        XING XING              W11-2



                   0         0.1    0.2         0.3     0.4    0.5    0.6    0.7    0.8        0.9        1.0

                         Time
                                                                                                          sec
                                                                                                                                                        PED PED
                                                                                     DWN                        EC         6-10-10   Title
                                                                                                                                                                                                 1
                                                                                     CKD                                                           Typical Layout for                                1


                                                                                     T.    E.                                            Activated Pedestrian Warning Device
                                                                                     Sr.       T.    E.                                                CITY    OF    LOS   ANGELES

                                                                                     Pr.       T.    E.                                DEPARTMENT                 OF   TRANSPORTATION

                                                                                     Approved               June 24, 2010                                                  Drawing No.


                                                                                                                                                                             S-55.0
                                                                                         for                Rita L. Robinson, General Manager
                                                                                  Fire Station
                                                                                                  To switch
                                                                              0'~20'                   ~
                              R1                                                                                  5'~20'




                                                                                                               20' min. M.A.

                                                                                                                  Detail A



                                                           Detail B

                     ~                                                           20' min. M.A.



To controller at adjacent signal if Condition C                               Note: Final street lighting may not include
 is satisfied or within 300 feet. (see Note 3)                                      the depicted mastarm lighting shown.
           33" symbol per SW 21B
12"                                         12"
                                       2'
 Y                                          Y                       Y                                              Y
               WHEN FLASHING                                                          WHEN FLASHING

                 4" Series D
         1'              5'           1'                                     (Same dimensions as Detail A)
                   Detail A
                                                                                          Detail B
Authorization

Fire Station Warning Beacons shown on this plan are authorized when:
1. There are existing warning beacons that flash all-day or during non-emergency periods and it is
    desired to retain some form of warning beacons; or
2. There are no existing warning beacons, the Fire Station Captain requests or concurs with Fire Station
    Warning Beacons, and an engineering study using LADOT guidelines documents Condition A, B, C or D
      below:

      A. An accident pattern involving emergency vehicles at or near the fire station driveway.
      B. The cross traffic visibility between the emergency vehicle driver and arterial street motorists is less
         than an acceptable gap.
      C. The queue extending from a nearby signal recurrently blocks the driveway and "KEEP CLEAR"
         pavement messages have not been effective.
      D. There is in excess of 30 seconds of delay for existing emergency vehicles.
Operation
1. The beacons are dark in the absence of a manual emergency response activation.
2. Upon an emergency response, a station officer manually activates a switch to commence flashing of the
      yellow beacons. The beacons immediately flash alternately in push/pull fashion. The duration of emergency
   flashing operation generally is 45 seconds. The warning signs and flashing beacons complement Section
   21806 of the Vehicle Code, regarding driver and pedestrian responsibilities near authorized emergency
   vehicles. They serve to alert motorists when an emergency is in effect and where emergency vehicles will
   be entering the street.
3. If Condition C is satisfied or if there is an adjacent traffic signal within 300 feet then it should operate
   under pre-emption operation. This pre-emption operation will hold vehicles from approaching the fire
   station in one direction, allow queued vehicles to clear the driveway in the opposite direction and enable
   emergency vehicles to clear the intersection. The operation is as follows:
   The phase receiving the green goes to normal pedestrian and yellow clearances followed by 3 seconds of
   all red for all approaches with an opposing, permissive left-turn, in order to preclude a left-turn trap
     situation. Then the approach to the adjacent signalized intersection which is on the departure from the
     Fire Station goes to green and stays in green. All other vehicle approaches stay in red and pedestrian
      indications provide a solid Upraised Hand (Don't Walk) display.
4. At the end of emergency preemption, normal signal operation resumes from the current position. Flashing
   yellow beacons are extinguished.



                                             DWN         MT       12-05-05    Title
                                                                                                                               1
                                                                                                                                   1
                                             CKD
                                                                               Fire Station Warning Beacons
                                             T. E.

                                            Sr. T. E.                                        CITY OF LOS ANGELES

                                            Pr. T. E.    SS       1-25-06       DEPARTMENT OF TRANSPORTATION

                                             Approved                                      January 30, 2006   Drawing No.


                                                                                                                 S-60.0
                                                for   Frances T. Banerjee, Interim General Manager
                                                                                                                                   Protected left-turn phasing



                                                                                                                                   Protected permissive
                                                                                                                                   left-turn phasing


                                                                                                                                   Opposed phasing or lag
                                                                                                                                   left-turn phasing


                                                                                                                                   Permissive phasing
                               Middle of No.2 Lane




                                                     Middle of Left-turn Lane(s)

                                                                                    Middle of No.1 Lane


                                                                                                               No. 2 Lane



                    Note   3


                                                                                                                                               Extension of
                                                                                                                                               Middle of
                                                                                                                                               Applicable
                                                                                                                                               Approach lane



                                                                                                          5'




                                                                                                                                                      Detail "A"



  Notes:

1. For new construction, the mastarm length should be selected so that the head locations are
   within 3 feet of the locations shown above. Curved alignments should locate the mastarm head
   within 3 feet of the tangent to the center of the respective approach lane at stop line (see
   Detail A). Where street trees or other obstructions interfere with signal head visibility, the
   mastarm signal head location should be extended to provide adequate visibility.
2. For existing traffic signals where there is a project involving special funding, mastarm lengths
   should be changed to ensure that they meet the criteria in Note 1.
3. Where an approach has 4 or more through and right turn lanes, a second mastarm signal
   head should be placed 15 feet to the right.


                                                        DWN                                                            MT   12-05-05   Title
                                                                                                                                               MASTARM SIGNAL HEAD                1
                                                        CKD
                                                                                                                                                                                      2
                                                                                                                                                      PLACEMENT
                                                        T.                         E.

                                                       Sr.                         T. E.                                                          CITY   OF LOS     ANGELES

                                                       Pr. T.                                             E.           SS   1-25-06     DEPARTMENT OF TRANSPORTATION

                                                        Approved                                                                                 January 30, 2006   Drawing No.


                                                                                                                                                                       S-65.0
                                                                             for                          Frances T. Banerjee, Interim General Manager
           Alternate    location   when

           visibility distance stated                       12"
           below cannot      be    achieved

           with preferred location

                                  preferred location


                                                                                             D




   Provide a nearside highmount 12" signal
   head to supplement the mastarm head                                                   °
   when    the mastarm      head     is   not   visible                                20
                                                                                   °
                                                                               0
                                                                              2
   or is outside of the 20° cone anywhere
   along a curved approach within "D"
   as shown in the table. W41 signing shall
   be installed for any speed limit where
   minimum visibility distances shown in
   Table   4-1 of the MUTCD          cannot      be met.

   Clearance to a highmount 12" head
   mounted      on   a vertical    standard should
   be between 14' and 18', and positioned
   to avoid interference with visibility
   obstructions such as utility lines.


      Speed Limit            D
         mph                 ft

     25                     215

     30                     270

     35                     325                      Curved Approach Criteria
     40                     390

     45                     460

     50                     540

     55                     625




    CITY   OF    LOS    ANGELES                     Title
                                                              MASTARM SIGNAL HEAD                2
                                                                                                         Drawing No.
DEPARTMENT      OF   TRANSPORTATION                               PLACEMENT
                                                                                                     2
                                                                                                          S-65.0
                                          1' TYP.




    Dist. Bet. DYCL      No. of Pairs       Dist. Bet. Loop              Dist. Bet. DYCL         No. of Pairs         Dist. Bet. Loop
   and Curb Face (A)           of Loops   and Curb Face (B)             and Curb Face (A)          of Loops       and Curb Face (B)
          10'                     1                 3'                          15'                   1                     6'
          11'                     1                 3'                          16'                   1                     6'
          12'                     1                 3'                          17'                   1                     7'
          13'                     1                 4'                          18'                   1                     8'
          14'                     1                 5'                          19'                   1                     8'




                CASE B: DUAL PAIR



                                                                                                                  B

                                                                                                                        A
                                                                                                              C
                                                                  S
                       C
                 A

                                                                                                          8' TYP.
                           B




                                          1' TYP.



                        Dist. Bet. DYCL         No. of Pairs      Dist. Bet. Loop
                       and Curb Face (A)            of Loops    and Curb Face (B)           Dist. Bet. Loops (C)
                                 20'                     2               3'                        15'
                                 21'                     2               3'                        15'
                                 22'                     2               3'                        16'
                                 23'                     2               3'                        16'
                                 24'                     2               4'                        16'
                                 25'                     2               5'                        16'


                                                    Single Lane Approaches
SEE S-70.1A AND S-70.1D                             DWN          EC    6-10-10      Title
                                                                                                  LIMIT LINE INDUCTIVE                    1
IN THE SPECIAL PROVISIONS                           CKD                                                                                       2
                                                                                             LOOP DETECTOR PLACEMENT
AND STANDARD DRAWINGS                               T. E.

FOR THE INSTALLATION AND                            Sr. T. E.
                                                                                                  CITY OF LOS ANGELES
MODIFICATION OF TRAFFIC SIGNALS                     Pr. T. E.                           DEPARTMENT OF TRANSPORTATION
                                                    Approved    June 24, 2010                                               Drawing No.
FOR INSTALLATION DETAILS

                                                                                                                                 S-70.0
                                                     for        Rita L. Robinson, General Manager
                                                                                       Single Lane Approaches


                                                                                                A
                                                                                                    B
                                                                                                        C
                                                                                                            D


                                                          Centered in Lane

                                                            S

                                                Centered in Lane

 D
     C
          B
                A




                                     1' TYP.
          See Guidelines on
 Single Lane Approaches




                                               Multi Lane Approaches




                          NOTES:
                          1.    ALL LOOPS ARE 6' x 6' WITH 8' SEPARATION.

                          2.    A,B,C,D ARE DIMENSIONS TO BE SHOWN ON PLANS
                          3.    THE LOOP DETECTORS ADJACENT TO THE LIMIT LINE
                                SHALL BE BICYCLE DETECTORS.

                          4.    SEE STD. DWG. NO. S-70.1A AND S-70.1D FOR
                                INSTALLATION DETAILS.




         CITY   OF   LOS       ANGELES            Title
                                                                LIMIT LINE INDUCTIVE    2
                                                                                                Drawing No.
                                                                                            2
DEPARTMENT           OF   TRANSPORTATION                  LOOP DETECTOR PLACEMENT                S-70.0
Ped-Actuated Pedestrian Crossing                                                        Pre-Timed & Rest-in-Walk
(Pushbutton activates accessible pedestrian
 signals and the WALK interval.)                                                        Pedestrian Crossing
                                                                                        (Pushbutton activates accessible pedestrian signals
                                                                                        only. WALK interval is on recall.)


5 conductor                                   START CROSSING
                                                                                      5 conductor                                      START CROSSING
                                                      Watch For
cable                                                  Vehicles                       cable                                                   Watch For
                                                                                                                                               Vehicles


                                                 DON'T START
                                                Finish Crossing
                  2p                                  If Started
                                                                                                                                         DON'T START
                                                                                                                                        Finish Crossing
  O2 APS                                       TIME REMAINING                                  APS                                            If Started
                                              To Finish Crossing
                                     TIMER
                                                                                                                                       TIME REMAINING
                                                                                                                                       To Finish Crossing
                                                                                                                               TIMER
                                                DON'T CROSS


                                             TO CROSS                                                                                   DON'T CROSS

                                        PUSH BUTTOM




  O2 APS                                                                                       APS
                  2p



                                               PATENT 6,340,936                                                                        PATENT 6,340,936




                                                                      wires to controller pedestrian
                                                                      pushbutton (PPB) input
         Notes:
    1.   APS shall be used for situations where new pedestrian pushbuttons are
         being installed or where they are being replaced, due to maintenance.
    2.   Audio Specifications:
          WALK interval
           -Rapid "Tick" tone is activated with a duration of 0.15 second and repeats at 0.25 second interval
            for a maximum of 7 seconds. Then APS returns to locator tone for the remainder of WALK interval.
          FLASHING DON'T WALK interval and SOLID DON'T WALK interval
           -Locator tone shall have a duration of 0.15 second and repeat at 1-second                              intervals.
    3.   Vibrotactile Specifications:
          -Pushbutton vibrates only during the first 7 seconds of the WALK interval.
          -Tactile arrows shall be aligned parallel to the direction of travel on the associated crosswalk.
          -WALK tone and vibrotactile require actuation, even at pre-timed crossings.
    4.   See MUTCD 2003, Figure 4E-2 for pushbutton locations.
    5.   Countdown pedestrian heads shall be installed at all accessible pedestrian signal locations.
    6.   A separate 5 conductor cable shall be used to isolate from any other wires.


                                                                  DWN         EC        6-10-10     Title

                                                                  CKD                                       ACCESSIBLE PEDESTRIAN SIGNAL
                                                                  T. E.                                                        (APS)
                                                                  Sr. T. E.                                         CITY OF LOS ANGELES
                                                                  Pr. T. E.                            DEPARTMENT OF TRANSPORTATION
                                                                  Approved     June 24, 2010                                                  Drawing No.

                                                                                                                                                          S-73.2
                                                                    for               Rita L. Robinson, General Manager
   20"          Varies    20" 20"         Varies                  20"




                Photo Red Light Detection


                                      ~

                                               ~




                                                                                                                                                                   ~

                                                                                                                                                                            ~
                                      ~~ ~~

                                               ~~ ~~




                                                                                                                                                                   ~~ ~~

                                                                                                                                                                            ~~ ~~
   ight Detectors are used at signalized intersections having Automated
                                                                    S
     ent to activate a camera mounted on a nearby pole to photograph
    g the intersection during the red interval.
                                      ~

                                               ~




                                                                                                                                                                   ~

                                                                                                                                                                            ~
   hown is a typical installation. Field conditions may necessitate
                                         250'+50'



    s in each lane are used to determine the speed of the vehicle just
                                                             System Detection
   g the intersection. If Notes
                          the vehicle speed indicates the vehicle is
                          red interval, an initial photograph is taken. A
    ersection during the 1. System Detectors identify volume and occupancy and are used to determine the timing
   raph is taken one second later to show the vehicle fully within the
                            parameters in an automated signal system.
                              2. They are to be installed at 1/4 mile points or less and on all arterial street approaches.
                             However, if an arterial street carries less than 8,000 ADT then system detection on the
        actuation loops may require adjustment in photo loops. Maximum
                             associated approaches may be deleted.
        een two actuation loops shall not exceed 16'.
                              3. The precise locations are adjusted to avoid placement at cross streets, alleys, driveways,
                                    maintenance holes or vaults.
                                       ~

                                                ~




                                                                                                                                                                    ~

                                                                                                                                                                             ~
                                       ~~ ~~

                                                ~~ ~~




                                                                                                                                                                    ~~ ~~

                                                                                                                                                                             ~~ ~~
                              Title                                                                          S
                                                                                                                  Drawing No.
   ANGELES
                                                          Special Detector                           7
        NSPORTATION
                                                           Applications
                                                                                                         7
                                                                                                                    S-75.0
                                       ~

                                                ~




                                                                                                                                                                    ~

                                                                                                                                                                             ~
                                                        Distance per Table below



                           Detector Setback Table                                             Advance             Detection

                         Speed Limit                    Minimum   Distance
                                                                                 Notes
                              mi/hr                               ft
                                                                                 1. Advance Detectors are used to call and extend the green for
                            25                              105
                                                                                    higher speed arterial streets where the approach is actuated.
                            30                              140
                                                                                 2. Generally, they are used in conjunction with limit line detection.
                            35                              185
                                                                                    However, on streets with all-day parking prohibitions and no side
                            40                              230
                            45                              285
                                                                                    streets, alleys or driveways downstream of the advance detectors,
                            50                              340                     limit line detection may be deleted. In this case the advance
                            55                              405                     detectors can count arrivals on red and provide the appropriate
                                                                                    initial green time.
                                                                                 3. They are located so that a vehicle just upstream of the detector
                                                                                    that is displayed a yellow, due to a gap-out, max-out or force-
                                                                                    off, can comfortably decelerate to a stop.
                                                                                 4. On actuated approaches they shall be used for speeds of 40
                                                                                    miles per hour and above and may be used for lower speeds.
                                                                                 5. Where appropriate, they can be adapted to also function as
                                                                                    system detectors.


                                                                                         DWN                 MT     2-24-09   Title

                                                                                         CKD                                          Special Detector                               1
                                                                                                                                                                                         6

                                                                                         T.    E.                                      Applications
                                                                                         Sr.   T.    E.      JW     2-27-09          CITY OF LOS ANGELES
                                                                                         Pr.    T.   E.      SS     3-3-09       DEPARTMENT OF TRANSPORTATION
~




                                                                                         Approved                                                 March 3, 2009   Drawing No.
~~ ~~




                                                                                                                                                                   S-75.0
                                                                                               for            Rita L. Robinson, General Manager
~




                                                                             ~

                                                                                 ~




                                                                                                                                                                                             ~
                            Left Turn Pocket Length

                                            Distance per
                                            Table Below




                                                                  S




                                         Left Turn Queue Detector
     Notes
  1. The Left Turn Queue Detector is used for protected-permissive left turn phasing to place
     a call and extend the protected phase only when a queue of sufficient length develops.
  2. Two six-foot diameter circular loops with eight-foot spacing shall be used for queue detection.
  3. Typically, three seconds of call delay should be used to distinguish a moving vehicle from
     a standing queue.
  4. Lagging permissive-protected operation shall be utilized only where there is no opposing
     permissive left turn, because permissive left turners opposing a protected left turn could
     mistakenly believe that all through movement has been stopped.
  5. The placement of the queue detector is based upon the left turn lane storage distance, the
     queued vehicle desired to be detected, and the left turn phase sequence, according to the
     table below. The fourth queued vehicle generally should be detected, which minimizes the need
     for phase actuations while tending to ensure a maximum of two cycles of delay for the second
     and third vehicles. Third vehicle detection should be considered where there is a high
     probability that left turn vehicles might block the adjacent through lane.
  6. The left turn pocket should be lengthened, where feasible, to provide sufficient reserve
     storage to accommodate additional arriving vehicles after the detected vehicle places a call.
     To minimize the probability of vehicles blocking the adjacent through lane, the designated left
     turn vehicle should be detected for the associated pocket length shown in the table below.
     When the left turn lane is less than 110 feet, limit line detection without queue detection should
     be used for a leading phase, and a 20-foot setback should be used for a lagging phase.
  7. If a queue detector is implemented where the adjacent approach lanes are actuated, limit
     line detection is also required to place a call for the through phase (permissive turn),
     in addition to queue detection for the left turn phase.
  8. Where protected-permissive phasing has been authorized, based on documented bus delay,
     the queue detector should be placed upstream of the limit line, as shown in table. If a bus is
     the only vehicle, it will not place a call and will be able to turn during the permissive phase. If
     it is the second or third vehicle in the queue, the bus will place a call. If it is in the queue
     upstream of the detector, the preceding vehicles will place a call.


                                   Detector Setback Table (feet)
                                                            Detector Setback
                               Minimum
                                            Detected
                                Pocket
                                             Vehicle       Leading    Lagging
                                Length                     Phase      Phase

                                 110            Third        45          20
                                 145           Fourth        70          35
                                 110                Bus      55          25
                                              Left Turn Pocket Length

                                                               Distance per
                                            Title              Table Below
                                                                                               Drawing No.
    CITY   OF   LOS   ANGELES                             Special Detector            2
DEPARTMENT      OF   TRANSPORTATION
                                                           Applications
                                                                                          6
                                                                                               S-75.0

                                                                                     S
                                                                                          S




                                             ~~

                                                  ~~




                                                                                                                                     ~~
                                             ~

                                                  ~




                                                                                                                                     ~
                                                       Distance per Table below




,                                                                               Advance    Detection

                                                                                           45'
Revised
9, 2001                                                                      Detector   Setback    Table

an                                                                    Speed Limit                Minimum    Distance

                                                                        mi/hr




                                                                                                                       LANE

                                                                                                                              BIKE
                                                                                                       ft

                                                                           25                         105
                                                                           30                         140
                                                                           35 S                       185
                                                                           40                         230
                                                                           45                         285
                      LANE
              BIKE




                                                                           50                         340

                                                             45'           55                         405




                                                               Bicycle Detection
                                                              Notes

                                                          1. Advance Detectors are used to call and extend the green for
                                                             higher speed arterial streets where the approach is actuated.
                                                          2. They are located so that a vehicle just upstream of the detector
                                                             that is displayed a yellow, due to a gap-out, max-out or force-
                     Notes                                   off, can comfortably decelerate to a stop.
e                                                         3. On actuated approaches they shall be used for speeds of 40
                                                             miles per on streets where the adjacent vehicle
                     1. The Bicycle Dectector is used in bicycle lanes, hour and above and may be used for lower speeds.
rs                                                        4. Where green for bicyclists.
                        lanes are actuated, to call and extend the appropriate, they can be adapted to also function as
                                                             system detectors.
                                                          5. senstive they limited in conjunction with limit
                     2. The special detector configuration isGenerally, to theare usedmetal content in bicycles.line detection.
                                                             However, on streets with all-day parking prohibitions and no side
                     3. The placement of the advance detectors recognizes their slower travel speeds
                                                             streets, alleys or driveways downstream of the advance detectors,
                        (approximately 10 miles per hour), relative to those of motor vehicles, and enables
                                                             limit line detection may be deleted. In this case the advance
                        bicyclists to extend the green in order to clear the intersection before the red is
                                                             detectors can count arrivals on red and provide the appropriate
                        displayed. The placement of the advance detectors is optional.
                                                             initial green time.
                     4. Bicyclists at or upstream of the advance detectors can comfortably decelerate to a stop.
    r     1
                     5. Bicycle detectors are shown in S-70.1D.
                                                Left Turn Queue Detection
                Notes
             1. The Left Turn Queue Detector is used for protected-permissive or permissive-protected
                turn phasing to place a call and extend the protected phase only when a queue of suffic
                length develops.
                                                                Distance per
                                                                Table below
             2. Two six-foot diameter circular loops with eight-foot spacing shall be used for queue de
             3. Typically, three seconds of call delay should be used to distinguish a moving vehicle from
                a standing queue.
                                                      S
             4. Lagging permissive-protected operation shall be utilized only where there is no opposin
                permissive left turn, because permissive left turning motorists opposite a protected left
                could mistakenly believe that all through movement has been stopped.
             5. The placement of the queue detector is based upon the left turn lane storage distance,
                                 r
                             e pe
                queued c below desired to be detected, and the left turn phase sequence, according to t
                      ta vehicle
                        n
                    s
                  Di       e
                tableabelow. The fifth queued vehicle generally should be detected, which minimizes the
                        bl
                     T
                for phase actuations while tending to ensure a maximum of two cycles of delay for the
                and fourth vehicles. Fourth or third vehicle detection should be considered where there
                probability that left turn vehicles might block the adjacent through lane.
                              Rest-In-Red                 Detection
             6. The left turn pocket should be lengthened, where feasible, to provide sufficient reserve
                storage to accommodate additional arriving vehicles after the detected vehicle places a
                To minimize the probability of vehicles blocking the adjacent through lane, the designate
                                  Detector Setback
                turn vehicle should be detected for the Table
                                                          associated pocket length shown in the table belo
                                   lane is Speed      110 feet,
                When the left turn Desired less than Distance limit line detection without queue detection
                be used for a leading phase, and a 20-foot setback should be used for a lagging phase
                                        mi/hr           ft

             7. If a queue detector is implemented where the adjacent approach lanes are actuated, lim
                                         15          45
                                                         a
                line detection is also required to place70 call for the through phase (permissive turn),
                                          20
                in addition to queue detection for the left turn phase.
                                        25           105
                                           30              140
             8. Where protected-permissive phasing has been authorized, based on documented bus de
                                           35           185
                the queue detector should be placed upstream of the limit line, as shown in table. If a b
                                           40           230
                the only vehicle, it will not place a call and will be able to turn during the permissive pha
 Notes          it is the second or third vehicle in the queue, the bus will place a call. If it is in the queu
                upstream of the detector, the preceding vehicles will place a call.
1. Rest-In-Red Detectors are used to cause motorists to decelerate on the
                                                 Detector Setback Table (feet)
  approach to a signal, where there is a documented accident pattern with
                                                                       all
  excessive speed as the primary factor. The signal rests in red for Detector Setback
                                            Minimum
                                                        Detected
  directions when there is no call. On the arterial approach it rests in red
                                             Pocket
                                                         Vehicle     Leading
  until the vehicle places a call at which time the signal turns green         Lagging
  (assuming no call on the side street).    Length                    Phase       Phase

                                                110           Third     45           20
                                                                                                                                        S




                                                LANE
                                        BIKE
                                                                                                        PB3

                                                                                                        45'

                                                                                                              PB3                                      1



               3'
                                          BUS   ZONE




                                                                                                                                                            3'
                                                                                                                                        PB3


                              15'                                                                                            3


                                                                                                                      Detection
                                                                                                            Bicycle LOOP
                                                                                                                BUS

                                                                                      S
                                  BUS   LOOP




                                                                                                                                                           B1
                     B2




                                                                                                                                              15'




                                                                                                                                                           3'
           ~




                                                         ~
                3'




                                    PB3                                                                                BUS   ZONE


                          1   4
                                            Notes
                                    EXIST. I/C

                                               1. The Bicycle Dectector is used in bicycle lanes, on streets where the adjacent vehicle
                                                  lanes are actuated, to call and extend the green for bicyclists.
                          Bus Priority Detection with An Arterial Cross Street
                                               2. The special detector configuration is senstive to the limited metal content in bicycles.

                                               3. The placement of the advance detectors recognizes their slower travel speeds
                                                 (approximately 10 miles per hour), relative to those of motor vehicles, and enables
                                                             1                    5
                                                                                                  PB3
                                                 bicyclists to extend the green in order to clear the intersection before the red is
                                                                                       ALTERNATIVE CONNECTION
                                                                                                              1
                                                 displayed.                            SEE NOTE 5


                                                                                   advance detectors can comfortably decelerate to a st
                                               4. Bicyclists at or upstream of the PB3
                                                                                       OR

                                               5. Bicycle detectors are shown in S-70.1D.
                                                                             3'




                                                                                           SEE   NOTE   4


                                                                              S
                                                                                      B1




                                                                                                    BUS       LOOP
                                                                              3'




                                  Bus Priority Detection with A Minor Cross Street




                      1



                              PB3                        PB3
                                        BUS     ZONE

                                                                 2                                       Title
                                                                                                                                                                                       Drawi
                                               CITY    OF    LOS       ANGELES
                                                                                                                                 Special Detector
                      B4




                                                        B3




     3' TYP.                  15'                 3                                                                                                                            4
                                  DEPARTMENT
                                    BUS LOOP             OF      TRANSPORTATION
                                                                                                                                  Applications
                                                                                                                                                                                   8
                                                                                                                                                                                        S-
                                                                                      S
                                                                                                                       BUS       LOOP
                                                                                                                  B2




                                                                                                                                                      B1




                                                                                                                         3                   15'                 3' TYP.
                                                                                                    2



                                                                                                                       BUS   ZONE
                                                                                                            PB3                                PB3

                                                                                                                                         1




                                                                                                    PB3


                                     Bus Priority Detection on A Divided Street


                                                                     Title
                                                                                                                                                                 Drawing No.
    CITY       OF    LOS            ANGELES
                                                                                       Special Detector                                       5
DEPARTMENT           OF       TRANSPORTATION
                                                                                        Applications
                                                                                                                                                  6
                                                                                                                                                                  S-75.0
     LANE

              BIKE
                                                                                                                            S



                                                                                                    r
                                                                                             e pe
                                                                                          nc        w
                                                                                     s ta     b elo
                                                                                  Di     bl
                                                                                           e
                                                                                     Ta
                                   2070 CONTROLLER
                                                      2

                                   IN 332 CABINET                                      1

                                                          PB3
                                                                                                            Rest-In-Red Detection
                                                                                 PB3




                                                                3'
                                                    BUS LOOP




                                                                     B2
                                                                                                                                Detector Setback Table




                                                                1'
                                                                          6'
                                                                          Max.
                                                                                                                                Desired Speed     Distance
                                                                                  S
                                                                                                                                        mi/hr           ft
                                                                                           6'




                                                                                                       1'
                                                                                           Max.                                         15              45




                                                                                                  B1
                                                                                                             BUS LOOP
                                                                                                                                        20              70
                                                                                                                                        25          105




                                                                                                        3'
                                                                                  PB3                                                   30          140
                                                                                                                                        35          185
                                                                                                  1
                                                                                                                                        40          230


.                              Bus Priority Detection at A Mid-Block Crosswalk Signal
                                              Notes

                                                    1. Rest-In-Red Detectors are used to cause motorists to decelerate on the
                                                       approach to a signal, where there is a documented accident pattern with
                                                       excessive speed as the primary factor. The signal rests in red for all
                                                       directions when there is no call. On the arterial approach it rests in red
                                                       until the vehicle places a call at which time the signal turns green
top.                                              (assuming no call on the side street).
                               Bus Priority Construction Notes:
                           1                                                CONDUIT a safe stopping distance
                               INSTALL ONE PAIR #12 2. The detectors are3 placed at RUN ALONG OUTSIDE EDGE for the desired speed,
                                                     AWG DLC
                                                   such as
                               FROM EACH LOOP TO CONTROLLER    the design speed of a curve, as shown in the table.
                                                                            OF GUTTER.

                                                                                      the desired speed PULLBOX.
                                                   3. Motorists traveling at or belowCONDUIT AND INSTALL will not start to decelerate
                                                                        4  INTERCEPT
                           2
                               INSTALL TWO PAIR #12 AWG DLC
                                                      when crossing the detector because the signal will immediately change
                               FROM LOOP TO CONTROLLER
                                                      to green.         5  PROTECT EXISTING LOOP.


                                                     4. Motorists traveling above the desired speed and who see the red display will
                                                        start to decelerate upstream of the detector at or before a stopping distance
                                                        corresponding to their speed.   They will decelerate to a slower speed until they
                                                        reach the detector at which point the signal will change to green, if there
                                                       is no side street call.

                               Bus Priority Notes:
                                                     5. Generally they are used in conjunction with limit line detection. However, on stre
                                              with all-day a Type 332 cabinet.
                          1. Use Model 2070 controller in parking prohibitions and no side streets, alleys or driveways
                                                       downstream of the advance detectors, limit line detection may be deleted.
                          2. Use 2" conduit for the bus loop, unless otherwise specified.
                                                     6. Nearside mastarm heads are to be provided to enhance visibility, if necessary,
                                               as per shall have one
                          3. Loops 6'x40' and larger S-65.0, Sheet 2. turn of wire.
                               Smaller loops shall have two turns of wire.
                          4. Placement of the bus loop in the exact center of the cross street
                             is not critical, and should be adjusted to avoid manholes, vaults, etc.
    ing No.               5. Where stamped crosswalks exist, stubout shall emerge within the
                                                                       Title
                                                                                                                                                                     Dra
                                         CITY OF LOS ANGELES
                               center of intersection.
                                                                                                                        Special Detector                     5

-75.0                                  DEPARTMENT OF TRANSPORTATION
                                                                                                                         Applications
                                                                                                                                                                 8
                                                                                                                                                                      S
                          6. Bus priority loops are shown in S-70.1F.




                                                                 Title
                                                                                                                                          Drawing No.
                         CITY OF LOS ANGELES
                                                                                      Special Detector                          6
                     DEPARTMENT OF TRANSPORTATION
                                                                                       Applications
                                                                                                                                    6
                                                                                                                                             S-75.0
ility Head                Visibility Nomograph for Standard Visor Head
                                                     Visibility Nomograph for LED Lens and
                                                                        Place the line for "Center of Signal head.
                          Place the line for "Center of Signal Head Alignment" along assumed alignment of Head Alignment" along assumed align
ent of head.              Determine conformance with restricted visibility to conflicting approaches.
Use to restrict                                                          Check to see if the cone of visibility is adequate for all applicable appro
triction. Check                                                          and is adequately restricted to conflicting approaches.
s. During low
 limits.




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                                                                                                                                                                                        27.5°
                            0




                                                                    27°                                           27°                                                                                                               27.5°

                                                     Longitudinal Visibility Application-See Sheet 2
                                                            45°
                                                                                                                             45°

                                                     Lateral Visibility
                                                            General Notes-See Sheet 3                                                                                                                         55


                                                         Visibility Nomographs-See Sheets 4 ~ 9



                                                                                                                                                         it
                                                                                                                                                      Lim
                                                         Beveled Visor Application-See Sheet 10




                                                                                                                                                                                                                                                              V is
                                                                                                                                                                                                Center of Signal Head Alignment




                                                                                                                                                                                                                                                                ib i
                                                                      Application-See Sheet 11
                                                         Long Visor 54°                                                                       lity




                                                                                                                                                                                                                                                                 lit
                                                    Not to be seen by conflicting approach
                                                         Programmed Visibility Application-See Sheet 12
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                                                                  DWN                                MT            10-28-98    Title
                                                                                                                                                                                   DWN          MT                                 10-28-98   Title
plication of                    8
                                                                                                                                                         Application of                                                               4                       App
                                                                  CKD                                                                                                                                                                 12
 ility-Limited                      12
                                                                                                                                                        Visibility-Limited
                                                                                                                                                                   CKD
                                                                                                                                                                                                                                                             Visibi
   Signal Heads                                                   T. E.                                                                                               Heads
                                                                                                                                                      Traffic Signal E.
                                                                                                                                                                   T.                                                                                      Traffic
                                                                  Sr. T. E.                                                                                   CITY OF LOS ANGELES
  OF LOS ANGELES                                                                                                                                                       Sr. T. E.                                                                              CITY

T OF TRANSPORTATION                                               Pr. T. E.
                                                                                      DWN                               MT         12-06-05
                                                                                                                                        Title
                                                                                                                                                 Application of
                                                                                                                                   DEPARTMENT OF TRANSPORTATION
                                                                                                                                                                                  Pr. T. E.                                                     DEPARTMENT
                                                                                                                                                                                                                                                  1

                                                                  Approved
                                                                                      CKD                                                                                      Visibility-Limited
                                                                                                                                                                            1998  Drawing No.
                                                                                                                                                                                                                                                      11
    1998   Drawing No.                                                                                                                                                         Approved
                                                                                      T. E.                                                                                  Traffic Signal Heads

               S-85.0
                                                                                     Sr. T. E.
                                                                                                                                                                                    S-85.0
                                                                                                                                                                              CITY OF LOS ANGELES
                                                                                      Frances T. SS      General
                                                                                     Pr. T. E. Banerjee, 1-25-06Manager
                                                                                                                      DEPARTMENT                                                               TRANSPORTATION
                                                                                                                                                                                           OFFrances T. Banerjee, General Manager
                                                                                       Approved                                                                                    January 30, 2006                               Drawing No.

                                                                                                                                                                                                                                   S-85.0
                                                                                            for                 Frances T. Banerjee, Interim General Manager
 Head                 Visibility Nomograph for Left Beveled Visor Head

ment of head.         Place the line for "Center of Signal Head Alignment" along assumed alignment of head.
                      Use to determine conformance with restricted visibility to conflicting approaches.
ach lanes




ED
                          WB(ground)                                                                                                                                                   EB(ground)
                                                                                                                   <300'                                                               cutoff
                          cutoff
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                                                                                                                              24°




                                                                               40°

                                                                Not to be seen by
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                                                                conflicting approach
                                                         3.5'            8'                                                            8'                   3.5'
Lim




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                                                                                                                                                                           ilit
                          At the point where the visibility is 3.5' above ground passenger car motorists can
                                                                                                                                                                       isib
                          see the signal. Where it is 8' all bus and truck drivers can see it.
                                  ibi




                                                                                                                                                     ilit
                               Vis




                          1. Use programmed visibility heads for longitudinal cut-off where the distance                                                              V
                                                                                                                                            V i s ib




                              between signalized intersections is 300' or less.                                                                                      0
                             50




                                                                                                                                                   50




                          2. Mask the             downstream green display so that a motorist stopped on red at the
                             upstream             signal will not inadvertently act on the downstream green display.
                             Mask the             downstream red display so that a motorist receiving a green at the
                             upstream             signal will not inadvertently act on the downstream red display.
                           3. Do not mask yellow displays so that drivers of buses and tall trucks can see
                              the change interval in time to safely decelerate to a stop. The masked red
                              display becomes visible after the yellow display terminates.
                           4. Use the longest ground cut-off feasible, so as to maximize visibility once
                              motorists discharge from the upstream signal . Yet, use a practical physical
                              point in the field, sush as a crosswalk line or prolongation of the curb line.
                             Due to "bleeding", use inside not outside crosswalk line. On the signal plan
                             show the physical point and not just the distance to the ground cut-off.
                                                            DWN           MT                   10-28-98                        Title
lication of                                                                        Application of
                              9                                        Longitudinal Visibility :                                                                                                  5


lity-Limited                      12
                                                            CKD
                                                                                  Visibility-Limited                                                                                                  12

                                        Programmed Visibility Head Application [TrafficPV (G,R Heads ]
                                                                                         Signal only)
 Signal Heads                                      T. E.

                                                           Sr.   T. E.                                                                            CITY OF          LOS   ANGELES
OF    LOS   ANGELES

    OF     TRANSPORTATION                                  Pr.   T. E.                                                           DEPARTMENT OF                       TRANSPORTATION

    1998    Drawing No.                                     Approved                                                                                          1998       Drawing No.


              S-85.0                                                                                                                                                       S-85.0
                                                                          Frances T. Banerjee, General Manager



                          CITY OF LOS ANGELES                                 Title                                                                                                             Drawing No.
                                                                                         Application of Visibility-Limited                                                         2
                                                                                                                                                                                       11
                DEPARTMENT OF TRANSPORTATION                                                   Traffic Signal Heads                                                                               S-85.0
                                                            Visibility Nomo
                                                            Place the line for "Cente
                                                            Use to determine confor

                                       Lateral Visibility Notes



     1. At skewed or jogged intersections traffic signal heads are to be e
        the need to restrict lateral visibility. To the extent possible all far
        heads are to be designed to be configured so that no more than
        the lens width can be seen by motorists positioned anywhere alon
        line of a conflicting approach.

     2. Where restricted lateral visibility is necessary, right or left beveled
        visors or programmed visibility heads are to be used. Louvers are
        be used, as they limit visibility to all approaches.

     3. Right and left beveled visors restrict visibility to one side only. Lo
        restrict visibility to both sides. Programmed visibility sections can
        to restrict visibility to either or both sides.

     4. Where they adequately restrict lateral visibility, beveled (right or le
           visors are to be used in preference to programmed visibility head
           can "bleed" beyond its masked limits during low light conditions.

     5. Programmed Visibility heads have relatively narrow visibility cones
        with standard heads. Where they are considered for application th
        check to see that the visibility cone is adequate for the controlle

     6. Clear acetate copies of visibility nomographs should be used to d ns
                                                                         Le
        applicability of each type of laterally restricted head.



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    CITY    OF   LOS   ANGELES          Title
                                                Application of Visibility-Limited
DEPARTMENT       OF   TRANSPORTATION                  Traffic Signal Heads
   led Visor Head                                                                                                                                   Visibility Nomograph for Long
ssumed alignment of head.                          Visibility Nomograph for Standard Visor Head
                                                                              Place the line for "Center of Signal                                                                                                                                Head Alignment" along
 flicting approaches.                                                                                                                        Use to determine conformance with restricted visibility to c

                                                   Place the line for "Center of Signal Head Alignment" along assumed alignment of head.
                                                   Determine conformance with restricted visibility to conflicting approaches.




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                                                                                                                                                                                                      24°                                                    24°

                                                                                    45°
                                                                                                                                              45°




                                                                                                                                                                                                                                  26°

                                                                                                                                                                                                 Not to be seen by
                                                                                                     54°                                                                                        conflicting approach
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                                                                                                                                                                                                         DWN                                           MT          10-28-98      Title
          Application of                                   6

         Visibility-Limited                                    12                                                                                                                                        CKD

       Traffic Signal Heads                                                                                                                                                                              T.    E.


                 CITY   OF   LOS   ANGELES                                                                                                                                                               Sr.    T.               E.

   ARTMENT                OF      TRANSPORTATION                                                                                                                                                         Pr.    T.                E.                                                   DE
                           1998    Drawing No.                                                                                                                                                           Approved


                                     S-85.0
ral Manager                                                                                                                                                                                                                                            Frances T. Banerjee, Gen



                                  CITY   OF   LOS         ANGELES                         Title                                                                                                                 Drawing No.
                                                                                                   Application of Visibility-Limited                                                            4
                                                                                                                                                                                                    11
                        DEPARTMENT            OF   TRANSPORTATION                                        Traffic Signal Heads                                                                                                S-85.0
Visor Head
assumed alignment of head.
 nflicting approaches.




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        Application of                           7

       Visibility-Limited                            12


     Traffic Signal Heads
           CITY    OF   LOS   ANGELES

PARTMENT            OF     TRANSPORTATION
                    1998      Drawing No.


                                S-85.0
ral Manager



                           CITY    OF   LOS    ANGELES                     Title                                                                                              Drawing No.
                                                                                   Application of Visibility-Limited                                          5
                                                                                                                                                                  11
                   DEPARTMENT           OF   TRANSPORTATION                              Traffic Signal Heads                                                                   S-85.0
          Visibility Nomograph for Right Beveled Visor Head
           Place the line for "Center of Signal Head Alignment" along assumed alignment of head.
           Use to determine conformance with restricted visibility to conflicting approaches.




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                                                                                         40°

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    CITY OF LOS ANGELES                       Title                                                                                              Drawing No.
                                                      Application of Visibility-Limited                                                 6
                                                                                                                                            11
DEPARTMENT OF TRANSPORTATION                                Traffic Signal Heads                                                                   S-85.0
                         Visibility Nomograph for Long Visor Head
                 Place the line for "Center of Signal Head Alignment" along assumed alignment of head.
                 Use to determine conformance with restricted visibility to conflicting approaches.




                                                             13°                                 13°




                                                       24°                                             24°




                                                                            26°

                                                      Not to be seen by
                                                     conflicting approach
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                                                                                                             50




    CITY   OF   LOS           ANGELES                  Title                                                                                                 Drawing No.
                                                                   Application of Visibility-Limited                                                7
                                                                                                                                                        11
DEPARTMENT      OF     TRANSPORTATION                                    Traffic Signal Heads                                                                  S-85.0
      Visibility Nomograph for Programmed Visibility
      Place the line for "Center of Signal Head Alignment" along assumed alignment of
      The cone of visibility of the head can be masked within the limits shown. Use to
      lateral visibility when beveled or long visors do not provide the required restriction.
      to see if the cone-of-visibility is adequate for all applicable approach lanes. Durin
      light conditions programmed visibility heads can "bleed" beyond the masked limits.




                                                                                                                          PV




                                                             15°                                 15°




                                                       Masked area within
                                                        these limits is

                                                      not to be seen by
                                                     conflicting approach
                                                                                                       it
                                                t




                                                                                                           im
                                            Limi




                                                                                                       y L
                                                               Center of Signal Head Alignment




                                                                                                                 ilit
                                              lity




                                                                                                         V is ib
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                                                                                                                m
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                                  imu




                                                                                                                    Max
                               Max




    CITY   OF   LOS   ANGELES                        Title
                                                             Application of Visibility-Limited
DEPARTMENT OF     TRANSPORTATION                                   Traffic Signal Heads
                        Arden St.
                                                                                  A = 54° Angle of 50lens visibility
                                                                                  of a standard signal head. The signal
                                                                                  head      shown        is   intended   for   Arden
                                                                                  Street motorists. However, it can be
                                                                                  seen too easily by Diagonal Street
                                                                                  motorists, since the Angle A shading
                                                                                  crosses         that   limit   line.




                                                                                  B = 40° Angle of 50lens visibility
                                                                                  of a left-beveled visor signal head.
                                    ent




                                                                                  Since the Angle B shading does not
                                     Alignm




                                                                                  cross the limit line on Diagonal Street
                                                                                  a left-beveled visor would adquately
                                                                                  restrict lateral visibility.
                                                   d
                                             l Hea




                                                                           Di
                                       Signa




                                                                             ag
                                                                                  on
                                                                                       al
                                              r of




                                                                                            St
                                                C en te




                                                                                              .

                                                       A




                                       B




                                                                   Lateral Visibility:
                                    Beveled Visor Application (                                     or                   )




    CITY   OF   LOS   ANGELES                              Title                                                                 Drawing No.
                                                                    Application of Visibility-Limited                    9
                                                                                                                          11
DEPARTMENT      OF   TRANSPORTATION                                       Traffic Signal Heads                                     S-85.0
                        Ave
                        Clarita                                                     Beverly St.
                                  Ce
                                    nt
                                      er
                                           of
                                                Si
                                                  gn
                                                    al
                                                         He
                                                           ad
                                                                Ali
                                                                   gnm
                                                                      en
                                                                        t




                                                                             B
                                                                                               Di
                                                                                                 ag
                                                                                                   on
                                                                                                      al
                                                                                                           St
                                                                                                             .

                                                                                     A




    A = 54° Angle of 50lens visibility of a                                 B = 26° Angle of 50lens visibility
    standard signal head. The signal head                                   of a long visor signal head. Since
    shown is intended for Diagonal Street                                   the Angle B shading does not cross
    motorists. However, it can be seen too                                  the limit line on Beverly Street nor
    easily by Beverly Street and Clarita                                    on Clarita Avenue a long visor would
    Avenue motorists, since the Angle A                                     adequately restrict lateral visibility.
    shading crosses their respective limit lines.


                                                       Lateral Visibility:
                                      Long Visor Application (                                )




    CITY OF   LOS   ANGELES                       Title                                                          Drawing No.
                                                           Application of Visibility-Limited            10
                                                                                                         11
DEPARTMENT    OF   TRANSPORTATION                                Traffic Signal Heads                              S-85.0
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                                                                                                                                                                                                                                                          aiD
                                                 . Pedestrians might not be seen
            S                                      early-on by right-turning motorists.
                                                   Opposing vehicles might not be seen
                                                   early-on.
                                                   Opposing arterial left turns might
                                                   interlock.




                     Right Jog




                                                 . Pedestrians might not be seen
                                                   early-on by left-turning motorists.
                                                 . Opposing vehicles might not be seen
                S                                  early-on.
                                                 . Opposing left turns interlock.
                                                 . Difficult to determine if motorist is
                                                   making a left turn or jogged
                                                   through move.
                                                 . So-called opposing moves momentarily
                                                   can be positioned at approximatly right
Left Jog                                           angles to each other.




      Operational Challenges for the Minor Street
      Approaches to Signalized Jogged Intersections

       To select the most appropriate design for minimizing
       the above challenges see Sheet 2.




                    DWN          EC    6-10-10   Title
                                                                                             1

                    CKD                              Operation and Design of                     12


                    T. E.                         Signalized jogged Intersections
                    Sr. T. E.                                 CITY OF LOS ANGELES
                    Pr. T. E.                       DEPARTMENT OF TRANSPORTATION
                    Approved    June 24, 2010                              Drawing No.

                                                                              S-100.0
                     for        Rita L. Robinson, General Manager
      01 & 02 =angle between motorist looking straight ahead and back of opposing vehicle
      X1 & X2 =Distance along arterial from the crosswalk line or limit line to the signal pole
                or BCR at the far side of the first intersecting leg.
      D=Internal storage distance between real or hypothetical interior limit lines. For minor
         offset D may be a small or negative number.




                                                                    X1




                                      02

                                                    D

                                                               01




                                 X2




  To select the most appropriate design:
  1) Determine if there is a Left Jog or a Right Jog
     See Sheets 3, 5, 7, 9, 10 and 11 for left jogged intersections and Sheets 4, 6, 8 and
     12 for right jogged intersections.
  2) Determine D
     If D>40' then interior limit lines are required. If D<40' then the jog is operated as
     a single intersection. See Sheets 10, 11 and 12 for intersections with interior limit
     lines and Sheets 3 through 9 for single intersection operation.

  3) Determine 01 and 02
     If 01 or 02 is >20° and D<40' then some form of opposed phasing is required for
     the minor street. See Sheets 7 through 9 for situations requiring opposed phasing.
     See Sheets 3 through 6 for situations for which concurrent phasing is adequate. Note
     that for Sheets 4 and 6 opposed phasing is required if diagonal crosswalks are not
     feasible, due to the unexpected presence of pedestrians crossing the path of right-
     turning motorists.
  4) Determine X 1 and X2
     If X1 and X 2 >50' and D<40' then only internal mastarms are to be used on the
     arterial street. If X1 and X <50' then only external mastarms are to be used on the
     arterial street. See Sheets 3, 4, 7, and 8 for internal mastarm designs and Sheets
     5, 6 and 9 for external mastarm designs.


     Note:

     The drawings on Sheets 3 through 12 are not intended to show the required safety
     lighting design. Final lighting designs may not include the depicted mastarm lighting and
     and likely will include other lighting locations not shown.




                                            Title
                                                                                                 Drawing No.
     CITY OF LOS ANGELES                           Operation and Design of              2

DEPARTMENT OF TRANSPORTATION                    Signalized jogged Intersections
                                                                                            12
                                                                                                   S-100.0
                                                                                1) Install wh
                                                                                   a) D<40'
                                                                                   b) 0 1 an
                                                                                   c) X1 an
                                                                                2) The bevel
                                                                                    should be
                                                             APS                    where cro
                                                                 6P                 would see
                                                                  4P                the lens
               APS                                                                  signal as
                          4P                                                        limit line.
                                                                     8
                                                                 0
                                                                                    be used

 X2                                                                                 would no
                          04

          WATCH
       OPPOSING      02         02           . 01
         TRAFFIC                           in
                                          m                  08
                                      '              02
       R9-3a'S                       0
                                  3
                                 =
               2P               R
                                                             6P
                      06
                                                             R9-3a'S
               04                                                    WATCH
                           02         06                             OPPOSING
                                                            06       TRAFFIC


                                                08                             X1

              04


                                                    8P      APS
         8P
              APS
                2P


                                                                           1          2




                                                                           5          6




                     Left jogged Intersection
                          Internal Mastarms




                                                    Title
      CITY OF LOS ANGELES                                   Operation and Design
DEPARTMENT OF TRANSPORTATION                             Signalized jogged Intersec
                                                                                          1) Install where:
                                                                                             a) D<40'; and
                                                                                             b) 0 1 and 0 2 <20; and          -



                                                                                             c) X 1 and X 2 >50' ; and        -



                                                                                             d) Diagonal crosswalks are feasible
                                                                                          2) Where diagonal crosswalks are not
              APS    R3-2                                                                         feasible, use opposed phasing, as
                                                                                                  shown           on    Sheet       8.
             2P
            4P                                                                            3) The treatment to allow arterial left
                      06
                                                                                                  turns in one direction and prohibited
                                                                                                  in   the    other       direction            is   an

                                                                            WATCH                 operational option. For other
             04
                                                                08          OPPOSING              typical left turn operations on
                                                                            TRAFFIC               the   arterial street              see       Sheets
                                                                                                  6    and        8.
   X2                                   R
                                         C
                                        M =
                                            R                             APS             4) The beveled visors shown
                                         IN 3                                                     should be installed only
                              01           .  0
                    8P                         '                R3-2                              where       cross-traffic                  motorists
                                                                           6P
                         02                                06                                     would       see       50or             more       of
            04
                                   02                                                             the lens             area   of a           far-side
             2P                                                                 4P
                                                                     06
                                                                          08                      signal as they wait at the
            APS                                                                                   limit line. PV              heads          should      be
                                                02
                                                                                                  used       if    beveled        visors would
                                                                                                  not be adequate.
                     R/C




                                                       .
                                                     IN
                                                  'M
                                                 5




                                                                                         X1
                                                1




          WATCH
        OPPOSING
                              04
         TRAFFIC                                                           08    8P


                                                                 02

                                                                           6P

                                                                          APS




                                                                                     1        2                    3                     4




                                                                                     5        6                    7                     8




                    Right jogged Intersection
                         Prohibited Left Turn




                                                            Title
                                                                                                                                             Drawing No.
     CITY OF LOS ANGELES                                            Operation and Design of                                   4

DEPARTMENT OF TRANSPORTATION                                     Signalized jogged Intersections
                                                                                                                               12
                                                                                                                                               S-100.0
                                                                                    1) Install where:
                                                                                     a) D<40'; and
                                                                                     b) 0 1 and 0 2 <20; and
                                                                                                   -



                                                                                     c) X 1 and X 2 <50'




                                                                 APS
                                                                  6P
               APS
                                               06      06
                               4P                                     4P

                               04

                                                                 08
    X2
         WATCH
         OPPOSING
         TRAFFIC                              01
                          04
         R9-3a'S

              2P                                           02
                     06                                           6P

                                    .                            R9-3a'S
                                 in                   08
                                m
                          '
                        30               02
                                                                WATCH
                      R=                                        OPPOSING
                                                                TRAFFIC
                                                                               X1
                     04
                                                      08
                      02            02

         8P
              2P                                     8P         APS

              APS


                                                                           1         2        3          4




                                                                           5         6        7          8




                     Left jogged Intersection
                          External Mastarms




                                                   Title
                                                                                                             Drawing No.
     CITY OF LOS ANGELES                                  Operation and Design of                      5

DEPARTMENT OF TRANSPORTATION                           Signalized jogged Intersections
                                                                                                        12
                                                                                                               S-100.0
                                                                        1) Install where:
                                                                           a) D<40'; and
                                                                           b) 0 1 and 0 2 < 20; and
                                                                                            -



                                                                           c) X 1 and X 2 <50' ; and
                                                                            d) Diagonal crosswalks are feasible
                       02                                               2) Where diagonal crosswalks are not
                                                                            feasible, use opposed phasing, as
                                                                            shown on Sheet 8.

                APS
                                                                         3) If arterial left turns are to be
               2P                                                           allowed in both directions, at least
       APS     4P                                                           one direction shall have protected
                        06                                    WATCH         left turns, as shown. For other
                                                08            OPPOSING
                                                                            typical left turn options on the
                                                              TRAFFIC
                04                                                          arterial street see Sheets 4 and 8.
                                                   06
                                           06
  X2
                            02
                                                08            APS
        APS
                                                               6P
              8P
                                                                4P
                2P
                                                                     APS
               APS
                        04                 01
                                      05
                                 02
                                                                                X    1
             WATCH      02
        OPPOSING                                        08
                        04
             TRAFFIC
                                                 05      8P

                                                                     APS

                                                                6P



                                                              APS
                                                                     1           2         3          4




                                                                     5           6         7          8




                       Right jogged Intersection
                            Protected Left Turn




                                                Title
                                                                                                          Drawing No.
     CITY OF LOS ANGELES                                Operation and Design of                 6

DEPARTMENT OF TRANSPORTATION                         Signalized jogged Intersections
                                                                                                 12
                                                                                                            S-100.0
                                                                        1) Install where:
                                                                           a) D<40'; and
                                                                           b) 0 1 or 02 >
                                                                        2) The alternate s
                                                                           shown below, w
                                                                           head modificati
                                                                           be used only w
                                                                           would be opera
                                                      APS                  the more conve
                                                                           Generally, the a
                                                         6P
          APS        4P                                                    be necessary w
                                                              4P           occur on most
                                                               APS         lighter volume
                                                                           should   have    th
                          04
                                                                           If one   or both
                                                 03                        the arterial str
    X2                                                                     then the inters
                                                                           more efficient
                02
                      04    02             O1                           3) Where D>20', "
                                                                                    -


                                                                           pavement mark
                                                                           installed betwe
                                                                           legs, as shown
    R9-3a'S                                      02            APS
                     KEEP KEEP
                                   CLEAR CLEAR
                                                         6P



                                                 R9-3a'S      D
   R9-3a'S
                     CLEAR CLEAR                                           1            2


         2P
               06
                                   KEEP KEEP
  APS
                                                      R9-3a'S              5               6
                                   06
                       O2                  03
                                               06
               04
                                                                   X1          Alternate       1
                                         03                                1            2

   APS   3P
                                           3P         APS
          2P

         APS                                                               5               6




                                                                               Alternate       2
                                                                           1            2




                                                                           5               6



                Left jogged Intersection
         Internal Mastarms/Opposed Phasing




                                                 Title
     CITY OF LOS ANGELES                                 Operation and Design
DEPARTMENT OF TRANSPORTATION                          Signalized jogged Intersec
                                                                                        1) Install where:
                                                                                           a) D<40'; and
                                        18'min                                             b) 0 1 or 02 >20
                                                                                           c) X1 and X2 > 50'         -



                                                                                       2) The arterial, cat-tracked side-by-side
                                                                                            left-turn lanes, as shown, are possible
                                                                                            only where the painted median
                                                                                            channelization is at least 18' wide. For
                                                                                            other typical left turn options on the
                                                                                            arterial   street         see       Sheets      4    and     6.

                                                                                        3) The alternate signal phasing schemes
                                                                                            shown below with corresponding signal
                                                                                            head    modifications               should          be    used
                  APS
                                                                                            only where the intersection would be
                 2P
                                                                                            operating near capacity with the more
            3P                                           3P                APS
     APS
                                                                                            conventional opposed phasing. Generally,
                                                         03
                                                                                            the alternate phasing would be
                                                                                            necessary where pedestrian calls
                             06                                                             occur on most cycles. Where used,
                                                                                            the lighter volume side street
X2                      04
                                                                                            approach should have the right arrow
                                                         03                                 indications.         If   one       or    both      of    the
                                   02                                                       crosswalks           across         the   arterial        street
                                        9'                            R9-3a'S
      APS
                                                                                            can be eliminated, then the
                                        min
                         02
                                                                                            intersection operation can have more
                                                                           6P
                                  02                          06
                                                                                            efficient phasing than shown.
                 2P
                                                    06
                                                                                 APS    4) Where D>20' "KEEP CLEAR"
                                              9'                                                         -


                                              min   01
                                                                                             pavement markings should be
           R9-3a'S                                                                           installed   between            the       cross      street
                               04
                                                                                             legs, as shown in Sheet 7.
                                                          03                           X1
                              04
                                                         02                      APS         1           2                  3               4

                 APS
                                                                                4P
                             4P                                            6P
                                                                                             5               6              7               8
                                                                           APS




                                                                                                 Alternate       1

                                                                                             1           2                  3               4




                                        18'min.
                                                                                             5               6              7               8




                                                                                             Alternate       2
                             Right Jogged Intersection                                       1           2                  3               4
                                  Internal Mastarms

                                   Opposed Phasing

                                                                                             5           6                  7               8




                                                                   Title
                                                                                                                                                     Drawing No.
           CITY OF LOS ANGELES                                            Operation and Design of                                     8

DEPARTMENT OF TRANSPORTATION                                           Signalized jogged Intersections
                                                                                                                                       12
                                                                                                                                                       S-100.0
                                                                               1) Install where:
                                                                                  a) D<40'; and
                                                                                  b) 0 1 or 02 >20; and
                                                                                  c) X 1 and X 2 <50'
                                                                               2) See Sheet 7 for alternate
                                                                                   signal phasing schemes.


                                                          APS

                APS   4P                                       6P
                                            06      06
                                                           4P       APS

                      04
                                                         03
   X2

                                       01


                            04
        R9-3a'S                                                     APS
                                                 02
               2P                                          6P

        APS           06
                                                          R9-3a'S
                                             03
                                  02




                       04                                                     X1
                                                  03
                                 02
        APS
              3P       02
                                                         APS
                2P                                3P

               APS

                                                                          1          2        3         4




                                                                          5          6        7         8




                      Left jogged Intersection
               External Mastarms/Opposed Phasing




                                                 Title
                                                                                                        Drawing No.
     CITY OF LOS ANGELES                                 Operation and Design of                  9

DEPARTMENT OF TRANSPORTATION                          Signalized jogged Intersections
                                                                                                   12
                                                                                                            S-100.0
                                                                       Install   where   D>40'



                                                4P

                                                         APS
                           4P
               APS
                                                              6P
                                      06
                                                06
                            04
                     06




                     02
                          04     02

                                              02
           R9-3a'S
                                                          6P

                                                         R9-3a'S



       D




           R9-3a'S

               2P
                                                         R9-3a'S
                       06

                                      06     08

                                                   06


                                                   02

                                           08
                      02
                                                                   1    2           3       4
              2P                 02
                                            8P          APS

               APS

                       8P                                          5    6           7       8




                     Left jogged Intersection
                       Interior Limit Lines




                                           Title
                                                                                            Drawing No.
     CITY OF LOS ANGELES                           Operation and Design of      10

DEPARTMENT OF TRANSPORTATION                    Signalized jogged Intersections
                                                                                 12
                                                                                                 S-100.0
                                                                                Install where:


                                                                                 a) 40'<D<20
                       02
                                                                                  b) There ha
                                                                   APS
                                                                                     Right Ang
                                OLA PV                                               or more
               APS        4P
                                CUT-OFF                              6P
                                                                          APS
                                                                                     in a rece
                                                                                     at one o
                           04               OLB        OLB          4P               involving
                     OLB                  PV (G,R     only)                          from the




                     02        02    05
                          04
                                                       05                 APS
         R9-3a'S
                                                                     6P

                                                                    R9-3a'S



     D




         R9-3a'S

               2P
                                                                    R9-3a'S
         APS
                      01                              08
                                     01          06        06


                                                       OLA
                               PV (G,R   only)    08
               8P    OLA       OLA
                                                                            1       2
         APS
                                         OLB PV
               2P                                     8P           APS
                                         CUT-OFF

               APS                                                                         OLA
                                                       06
                                                                           5        6
                                                                                     OLB




                                                                           OLA and OLB inclu



                     Left jogged Intersection
                       Interior Limit Lines
                            Slot Clearance




                                                           Title
     CITY OF LOS ANGELES                                          Operation and Design
DEPARTMENT OF TRANSPORTATION                                   Signalized jogged Intersec
                                                                             1) Install where 40'<D<200'
                                                                             2) Mask only the Green and
                                                                                   Red   lenses   of    the   PV    heads.
            APS
                                                       4P
            2P                                                    APS
                     OLB                                                     3) The back-to-back left-turn
              4P
                                                                                   lanes, as shown, are possible
                    OLA   PV    CUT-OFF
                                                  08                               only where D>70'. Where not
                                      OLB                 OLB
                                     PV (G,R
                                                                                   possible, a left-turn lane in
                                                  only)
                                                                                   one direction, possibly with a
                                                                                   left-turn   restriction    in    the

                                                          02                       other direction, should be
                    02
                                                                                   considered.
                               02                 08
             2P
                                                                   R9-3a'S
         R9-3a'S




     D




                                                                   R9-3a'S

         R9-3a'S                                                        6P
                                            06              06
                           04

                     06

                               PV (G,R    only)
                     OLA
                               OLA
                                    OLB   PV      CUT-OFF
                                                                  8P
                          04

                                                  OLA             6P
             APS               8P                                 APS
                                                                             1            2              3                4




                                                                                                  OLA

                                                                             5            6              7                8
                                                                                           OLB




                   Right jogged Intersection                                 OLA    and   OLB     include      slot      clearance

                      Interior Limit Lines




                                                          Title
                                                                                                                           Drawing No.
     CITY OF LOS ANGELES                                          Operation and Design of                          12

DEPARTMENT OF TRANSPORTATION                                   Signalized jogged Intersections
                                                                                                                    12
                                                                                                                              S-100.0
                                                                             1         2     3        4




                                                                             5         6     7        8




                    O4APS

                      2P
                                                               4P
                      4P       O6                                         O4APS



                                                               O8
                                                         O6
                                                                 O6
                                                                            Highmount-
                                                          O8
                                                                 O2
                                                                            If approach is one lane,
                                                                            then this head should
                                                         O8                 be deleted.
                        8P
                             O2
                                          O2
                       2P                                                 O8APS
                                                               8P

                     O8APS




                                        "T" Intersection


This drawing is not intended to show the required safety lighting design. Final lighting
designs may not include the depicted mastarm lighting and likely will include other
lighting locations not shown.



                               DWN             EC      6-10-10    Title
                                                                                                           1
                                                                                                               8

                                                                      Typical Traffic Signal Layouts
                               CKD

                               T. E.

                               Sr. T. E.                                          CITY OF LOS ANGELES
                               Pr. T. E.                            DEPARTMENT OF TRANSPORTATION
                               Approved        June 24, 2010                                 Drawing No.


                                                                                                 S-101.0
                                  for           Rita L. Robinson, General Manager
                                                                   1     2         3       4




                                                                   5     6         7       8




                     O4APS                                  O4APS
                       2P
                                                              6P
                       4P                         O6          4P
                                O6                     O6




                           O4                               O8




                           O4                               O8




                     8P         O2    O2               O2
                                                               8P
                          2P                                6P
                     O8APS                                  O8APS




                                     4-Leg Intersection


      This drawing is not intended to show the required safety lighting design. Final lighting
      designs may not include the depicted mastarm lighting and likely will include other
      lighting locations not shown.




      CITY OF LOS ANGELES
                                        Title                                          Drawing No.

                                           Typical Traffic Signal Layouts
                                                                               2
DEPARTMENT OF TRANSPORTATION                                                       8
                                                                                       S-101.0
                                                            Not
                                                            Not




                     O4APS                                 O4AP

                        2P                                  6P
                       4P             O6         O6             4
                                                      O6

                                 O6

                            O4                             O8

                         O4

                                                           O8


                          O4                               O8




                      8P
                       2P                                    6P

                      O8APS                                O8AP




                                                                  1




                                       One Way Street
       Notes:

    1. For one-way streets with a roadway width less than 46 f
       signal head with the mastarm signal head placed within 5
       of the approach lane(s) should be installed.
    2. This drawing is not intended to show the required safety
       designs may not include the depicted mastarm lighting an
       lighting locations not shown.




                                       Title
       CITY OF LOS ANGELES

DEPARTMENT OF TRANSPORTATION               Typical Traffic Signa
                                                                         1        2         3      4




                                                                         5        6         7       8




                        O4APS                                       O4APS

                            2P
                                                                        6P
                           4P
                  O2APS              O1            O1   O6    O6              O6APS
                                                                         4P


                            O4                                      O8



                            O4




                                                                        O8


                                O4                                  O8



                   O2APS             O2                      02               O6APS
                           8P               O2                           8P

                            2P                                          6P
                                                                    O8APS
                        O8APS


                                                                   O6         For each approach having
                                                                              protected left-turn phasing,
                                                                              a near side primary signal
                                                                              head is added. This is not
                                                                              necessary for protected
                                                                              permissive phasing.




                                          Left-Turn Phasing
     Notes:


     1. Protected left-turn phasing is shown. See S-65.0 for mastarm head placement
        for other types of left-turn phasing.
     2. This drawing is not intended to show the required safety lighting design. Final lighting
        designs may not include the depicted mastarm lighting and likely will include other
        lighting locations not shown.




       CITY OF LOS ANGELES
                                           Title                                                Drawing No.

                                              Typical Traffic Signal Layouts
                                                                                        4
DEPARTMENT OF TRANSPORTATION                                                                8
                                                                                                S-101.0
                                                                                           R                      R



                                                                                         FL.R.                    Y



                                                                                           Y                 FL.Y.
              O4APS

                                                   4P
                   2P
              4P
                                                                                       Detail "A"          Detail "B"
                                                        O4APS
                                                                                          O4                     O4
                         O6




                                                                Driveway
                                                         6P
                                           O6   O8
               R/FL.R.
                          See Detail "A"           O6

                          and Note 3
                                                   O2
               R/FL.R.                                   6P
                                                O8                         1       2           3             4

                         O2                             O8APS
                8P
                                                   8P                                                            R/FL.R.
                              O2
                   2P
                                                                           5       6           7             8
              O8APS




                                                                           Where O8 traffic is moderately
                                                                           high or where the driveway is
                                                                           offset from the side street
                                                                           then opposed phasing should
                                                                           be considered.




                                       Signalized Driveway


    Notes:

    1. This typical design is appropriate where a review of use has determined that the
       driveway should be signalized. Normally, this design would be used only where the
       driveway could not easily be reconstructed to be configured with curb returns and a
       "step down" design along the path of pedestrians. New development driveways with
       higher traffic volumes at intersections should be required to construct street like
       driveways with a layout for a "T" or 4-leg intersection, as appropriate.
    2. This drawing is not intended to show the required safety lighting design. Final lighting
       designs may not include the depicted mastarm lighting and likely will include other
       lighting locations not shown.

    3. Detail "B" may be used where visibility is good and a flashing yellow indication
       provides adequete control of driveway traffic.




       CITY OF LOS ANGELES
                                           Title                                                            Drawing No.

                                                Typical Traffic Signal Layouts
                                                                                                   5
DEPARTMENT OF TRANSPORTATION                                                                           8
                                                                                                             S-101.0
                                                                                                            WAIT   WAIT

                                     PED XING                                                               HERE HERE
                                    Black letters on
                                   yellow background                    X > 10'                         06
                                                                       See Note 3
                                                                                                             04P
                                         Detail "A"




                                                                                                             Detail "C"
                                                        Detail "B"
                 5' min.




                                                                                                                    FL.R
                                                                  06
                                                        06
                                                                                                                    Y




                                                                                         50' min.
                                                                  Detail "A"
                                          04P
                    X




                           04APS                                                                                    G
                 20'




                                                                               20'
                                                                       02
     50' min.




                               06
                                                                       04APS

                                                         04P
                                                                                                            Detail "B"
                                                                                   X



                             Detail "A"
                                                                               5' min.




                                    02      02

                                                                                                    1   2          3              4




                                     Detail "B"
                                                                                                    5   6          7              8




                                            Signalized Midblock Crosswalk -Two Way Street


                      Notes:
                       1. Signal equipment should be combined with street lighting where feasible.
                       2. See S-493.0, Cases 13 & 14 for limit line locations. See S-481.0 for
                             ladder crosswalk detail.

                       3. Where X is greater than 10', install a pole for the pedestrian head at the
                             location shown, and a separate pole for the secondary vehicle head
                             at the limit line, as shown in Detail "C".
                       4. This drawing is not intended to show the required safety lighting design.
                          Final lighting designs may not include the depicted mastarm lighting and
                          likely will include other lighting locations not shown.
                       5. During Phase 4 pedestrian sequence, Phases 2 & 6 receive a flashing red
                             signal display.



                CITY OF LOS ANGELES
                                                          Title                                                                   Drawing No.

                                                             Typical Traffic Signal Layouts
                                                                                                                          6
DEPARTMENT OF TRANSPORTATION                                                                                                  8
                                                                                                                                      S-101.0
 Not less than 20'
 Not greater than 35'
                                                                                y


                                               Detail "B"


                                02                                 02
                                        02                    02
         50' min.




                     Detail "A"              04P                   Detail "A"
                                                        04P

                              04APS                                04APS
                    20'
                    5' min.




                                                                           1




                                                                           5




                                      Signalized Midblock Crosswalk-One Wa


      Notes:
      1. Signal equipment should be combined with street lightin
      2. See S-493.0, Cases 13 & 14 for limit line locations. S
          ladder crosswalk detail.

      3. For one-way streets with a roadway width less than 46
         signal head placed within 5 feet of the center of the a
         be installed.

      4. During Phase 4 pedestrian sequence, Phase 2 receives




                                                      Title
       CITY OF LOS ANGELES

DEPARTMENT OF TRANSPORTATION                             Typical Traffic Signa
                                                                                                              50' min.




                                                                            ɸ8APS         R13A
                ɸ8APS                                                               8P                                   ɸ4APS
                      2P                                                R13A                4P                             1P
                      8P    ɸ6                                                                  ɸ4APS              ɸ1       4P          R13A
                                                               ɸ6         ɸ6                      ɸ4                                    R10-6
                     PV                                                      ɸ8
                                                                                            ɸ1
                     OLA    High mount                                  R9-3A(2)




                                                                                                CLEAR CLEAR
                                                                                                                KEEP
              (G,R only)    at 14'                                      R9-3B(2)
                                                                               R13A
                                                                                                 ɸ4
                                                                         TOP MOUNT




                                                                                                                KEEP
                                                                               ɸ8
                     PV                                                                                        PV Cutoff
                     OLA                                                                    ɸ1                 OLA
                            High mount                                  R9-3A(2)
              (G,R only)    at 14'
                                                                        R9-3B(2)
                                                                                            R13A
                                                                             ɸ8
                                                                         ɸ2                     ɸ4                          4P
                     8P     ɸ2           ɸ2                                                     ɸ4APS              ɸ1
                       2P                                                             8P    4P                             1P

                 ɸ8APS                                                              ɸ8APS                                ɸ4APS
                                                                                R13A




                                                                                <     20'




                                         EXCLUSIVE

                                     1               2              3                 4
                                                                                          OLA
                                         OLA




                                     5               6              7                 8




                                                     OLA Includes Slot Clearance




                                 Intersection with Signalized Frontage Road


        NOTES:
        1.   	 Thisdrawing is not intended to show the required safety lighting design. Final
        	 lightingdesigns may not include the depicted mastarm lighting and likely will
        	 include other lighting locations not shown.

        2. 	 Mask only the green and red lenses of the programmed visibility (PV) heads.
        3.	 To be used in Case 9 of S-493.0.




      CITY OF LOS ANGELES
                                                     Title                                                                                 Drawing No.

                                                         Typical Traffic Signal Layouts
                                                                                                                                8
DEPARTMENT OF TRANSPORTATION                                                                                                        8
                                                                                                                                            S-101.0
                               12"
                                         1




          3

     12"

                                                 12"
                                                4
                                    >10'
              2
                  12"




Provide   mastarm   heads    where:

. Approach has 2 or more striped lanes (mastarms 1 , 2 & 3 ).
. Departure curb line has a 10' or greater offset to the right of
  approach curb line (mastarm 4 ), or a field investigation reveals the
 primary head location does not meet MUTCD Section 4B-12
 visibility requirements.




                        DWN              MT    10-22-98   Title

                        CKD
                                                                  Mastarm Signal Head                 1
                                                                                                          1
                                                                  Installation Criteria
                        T.    E.

                        Sr.   T.    E.                                CITY   OF   LOS   ANGELES

                        Pr.    T.   E.   JEF   11-2-98     DEPARTMENT OF TRANSPORTATION

                        Approved                                        11/13/1998      Drawing No.


                                                                                           S-102.0
                                                             12"
                                      12"                          12"




                                                                                           >150'




                                                                   12"
                                   12" 12"




                                                                         See Note 2




Notes:

1. All signal indications shall have 12" sections except as follows:
	 (a) Three-section near-side signals that are not high-mounted.
	 (b) Five-section near-side signals that have 12-inch arrows and three 8-inch circular            	
	       indications.
	 (c)   Signals that are exclusively used for bicycles at designated bicycle crossings.
	 (d)   Far-side ground-mounted signals at closely spaced intersections (less than 300')       	
	   where it is not pratical to install visibility-limited signal indications.
2. Where the nearest signal is 150 feet or more beyond the stop line, a supplemental           	
	 near-side indication shall be installed.




                                       DWN          MT    02-28-08   Title
                                                                               Criteria for 12"         1
                                       CKD          RAR   02-28-08                                          1

                                       T. E.        JV    3-20-08
                                                                                Signal Heads
                                       Sr. T. E.    JW    3-21-08             CITY OF LOS ANGELES
                                       Pr. T. E.                         DEPARTMENT OF TRANSPORTATION
                                        Approved   3-27-08
                                                                                          Drawing No.

                                                                                            S-103.0
                                             for   Rita L. Robinson, General Manager

				
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