Intersection Treatments by gabyion

VIEWS: 98 PAGES: 130

									Record ID

Jurisdiction

County

Street 1

Route Number Street 1

1

Safetyville, USA

Countermeasure County

Example Street

SR 21

Logmile Street 1

Street 2

Route Number Street 2

Logmile Street 2

Street 3

68.56

Treatment Avenue

72.37

Route Number Street 3

General Location Description

Intersection Type

Area

Two-way stop, 4 leg

Rural

Condition Prior

Volume Before

Year of Volume

Two-way stop controlled intersection.

8000

2000

Treatment

U22 Pavement markings with supplementary messages, such as “stop ahead”

Description

Treatment Approach

Installed thermoplastic pavement markings saying "STOP AHEAD" on Treatment Avenue approaches. Pavement markings placed 200' in advance of stop.

NB and SB

Cost

Construction

Open

Other changes

$1,000

1 /1 /2001

1 /2 /2001

No other changes made at intersection.

Comments

Record ID

Jurisdiction

County

Roadway/Street Name

Route Number

1

Safety Town, USA

Countermeasure County

Main Street

SR526

General Location Description

Roadway Type

Area

Condition Prior

Two-lane with center two-way left turn lane

Urban

Roadway was a four-lane, undivided roadway with four 11' lanes

Volume Before

Year of Volume

Treatment

18500

11/1/1999

Center two-way left-turn lanes for four- and two-lane roads

Description

Cost

Logmile start

Converted to 3 lanes: 2 through lanes and one center two way-left turn lane

$1,000

27.34

Logmile end

Segment Length

Construction

Open

29.54

2.2

12/1 /1999

1 /15/2000

Other changes

Comments

Lanes became 12' lanes and shoulder was widened by 4' on each side.

Record ID

Jurisdiction

County

Roadway/Street Name

Route Number

1

Safetyburg, USA

Countermeasure County

Front Street

SR919

General Location Description

Roadway Type

Location Type

Area

0.2 miles south of Wake County line

Two-lane

Curve

Rural

Condition Prior

Volume Before

Year of Volume

35 MPH advisory speed curve. Only advance information for curve was a standard curve ahead sign.

8000

2000

Treatment

Description

Automated warning signs when driver too fast for curve (particularly for trucks)

Solar powered sign provides automated warning when vehicles approach curve at over 35 mph, installed on SB approach

Cost

Logmile start

Logmile end

Spot length

Construction

$1,000

12.38

12.59

0.21

5 /26/1975

Open

Other changes

5 /28/1975

New chevrons added to curve.

Comments

Warning sign added to southbound approach only.

Treatment Target (manual) enforcement for aggressive driving combined with educational and public information Target (automated) enforcement for aggressive driving combined with educational and public information Education and sanctions against repeat offenders Change or mitigate the effects of identified elements in the environment Reduce nonrecurring delays and provide better information about these delays Slower Vehicles Keep Right signs Widen painted edgelines to slow and calm aggressive drivers Install profiled thermoplastic strips for centerlines

Cost

Use

Low

Tried

NA

NA

Low

Experimental

Medium/High

Experimental

Medium/High

Experimental

NA

NA

NA

NA

Low

Tried

Wider cross sections on two-lane roads Center two-way left-turn lanes for four- and two-lane roads Narrow "buffer median" on two-lane roadways Alternating passing lanes or four-lane sections at key locations to prevent head-on crashes Median barriers for narrow-width medians on multilane roads to prevent head-on crashes Install edgeline “profile marking,” edgeline rumble strips or modified shoulder rumble strips on section with narrow or no paved shoulders Midlane rumble strips

Medium/High

Experimental

Medium

Tried

Low

Tried

Medium/High

Tried

Medium

Tried

NA

Experimental

Low

Experimental

Provide enhanced pavement markings

Low

Tried

Provide skid-resistant pavement surfaces Enhanced shoulder or in-lane delineation and marking for sharp curves Delineate utility poles or trees with retroreflective tape

Medium

na

Low

NA

NA

Experimental

Enhanced guardrail reflectors Widened pavement/pull-offs on isolated segments for emergency situations Automated warning signs when driver too fast for curve (particularly for trucks) Adding cable barrier for LD5

NA

NA

NA

NA

NA

NA

NA

NA

Combination of lane width versus shoulders

NA

NA

Driveway closures/relocations

Medium

Tried

Driveway turn restrictions

Low

Tried

Longer left turn lanes at intersections

Medium

Tried

Offset left-turn lanes at intersections

Medium/High

Tried

Bypass lanes on shoulders at T-intersections Left turn acceleration lanes at divided highway intersections Longer right-turn lanes at intersections

Low

Tried

Medium

Tried

Medium

Tried

Offset right turn lanes at intersections

Medium/High

Tried

Right turn acceleration lanes at intersections

Medium

Tried

Full width paved shoulders in intersection areas

Medium

Tried

Restrict or eliminate turning maneuvers by signing

Low

Tried

Channelize or close median openings Convert four legged intersections to two Tintersections Convert offset T-intersections to four legged intersections Indirect left-turn treatments to minimize conflicts at divided highway intersections Close or relocate "high-risk" intersections Change horizontal and/or vertical alignment of approaches Roadside markers or pavement markings for gap assistance Large regulatory and warning signs at intersections

Low

Tried

High

Tried

High

Tried

Medium

Tried

High

Tried

High

Tried

Low

Experimental

Low

Tried

Install rumble strips on intersection approaches

Low

Tried

Supplementary stop signs mounted over the roadway Pavement markings with supplementary messages, such as “stop ahead” Flashing beacons at stop controlled intersections

Low

Tried

Low

Tried

Low

Tried

Retime adjacent signals to create gaps at stopcontrolled intersections Lane assignment signing or marking at complex intersections Turn path markings Double yellow centerline on the median opening of a divided highway at intersections Targeted enforcement to reduce stop sign violations Targeted public information and education on safety problems at specific intersections Enhanced signing and delineation Splitter islands on the minor-road approach to an intersection Stop bar (or provide a wider stop bar) on minor road approaches Dashed markings (extended left edgelines) for majorroad continuity across the median opening at divided highway intersections Improved maintenance of stop signs

Low

Tried

Low

Tried

Low

Tried

Low

Tried

Medium

Tried

Low

Tried

Low

Tried

Medium

Tried

Low

Tried

Low

Tried

Low

Tried

Stops signs with increased retroreflectivity

NA

NA

Intersection lighting intensity

NA

NA

Use shoulder for right turn lane

NA

NA

Time Frame

NCHRP 500 Series Report Volume 01: A Guide for Addressing AggressiveDriving Collisions Volume 01: A Guide for Addressing AggressiveDriving Collisions Volume 01: A Guide for Addressing AggressiveDriving Collisions Volume 01: A Guide for Addressing AggressiveDriving Collisions Volume 01: A Guide for Addressing AggressiveDriving Collisions NA

Short

NA

Medium

Medium

Medium

NA

NA

NA Volume 04: A Guide for Addressing Head-On Collisions Volume 04: A Guide for Addressing Head-On Collisions Volume 04: A Guide for Addressing Head-On Collisions Volume 04: A Guide for Addressing Head-On Collisions Volume 04: A Guide for Addressing Head-On Collisions Volume 04: A Guide for Addressing Head-On Collisions Volume 06: A Guide for Addressing Run-Off-Road Collisions Volume 06: A Guide for Addressing Run-Off-Road Collisions

Short

Long

Short

Medium

Medium

Medium

NA

Short

Short

Volume 06: A Guide for Addressing Run-Off-Road Collisions Volume 06: A Guide for Addressing Run-Off-Road Collisions Volume 06: A Guide for Addressing Run-Off-Road Collisions Volume 06: A Guide for Addressing Run-Off-Road Collisions NA

Medium

Short

na

NA

NA

NA

NA

NA

NA

NA

NA

NA Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions

Medium

Short

Medium

Medium

Short

Medium

Medium

Medium

Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions

Medium

Medium

Short

Short

Medium

Medium

Medium

Long

Long

Medium

Short

Short

Short

Short

Short

Short

Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions Volume 05: A Guide for Addressing Unsignalized Intersection Collisions NA

Short

Short

Short

Short

Short

Short

Medium

Short

Short

Short

NA

NA

NA

NA

NA

ID 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Strategies for Signalized Intersections Improve visibility of signal heads Provide back-up plates for signals Improve sight distance to traffic signal Provide strobe lights on traffic signals Provide a protected left-turn phase Provide actuated signals Install dilemma detection system Prohibit right turn on red Modify signal timing Provide signal coordination Implement long distance detection Provide “Signal Ahead” warning sign Add pedestrian signals Install pedestrian-actuated signals Add countdown to pedestrian signals Install cameras to detect red-light running Upgrade the signal controller to allow different phasing or actuation Install pedestrian barriers Provide refuge island / raised median

ID 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Strategies for Roadway Segments Improve roadway delineation Add guardrail Flatten side slopes Realign roadway Remove roadside hazards Close access points Improve access points Add lanes Widen lanes Widen shoulder Pave shoulder Widen clear zone Provide two-way left-turn lane Provide passing lanes Add pedestrian crossing Add pedestrian refuge island Add shoulder edge rumble strips Add centerline raised pavement markers Add centerline rumble strips Add edgeline raised pavement markers Improve lighting Remove/restrict movements at access points Provide bicycle lanes Implement school speed zone Improve pavement friction Restrict parking near driveways

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

Install proper advance warning signs Provide anti-skid pavement treatment Modify grade/superelevation Improve roadway delineation Provide chevron markers on curves Install median barriers Narrow lanewidth to increase number of lanes Improve edge drop off Improve fencing Improve traversability of drainage structures Install animal underpasses or overpasses Install chevrons Install automated anti-icing systems

54 55

ID 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Intersection Strategies Improve sight distance Improve delineation of stop bar and center and lane lines Provide lateral rumble strips Improve road name signing Provide left-turn lane Provide right-turn lane Provide longer turn lane Channelize turn lane Install lane assignment signs to provide guidance through intersection Widen shoulder Close access points Add signals Provide flashing beacons on advance warning signs Remove/restrict movements at access points Improve lighting Install in-pavement crosswalk lighting Install a roundabout Install median acceleration lanes Reduce speed limit on approaches Increase enforcement Restrict parking near corners Reduce/eliminate unsignalized intersection skew Add raised island Provide bus bay Resurface approaches Improve/maintain drainage structures

27 28 29 30 31 32

Install pedestrian underpass or overpass Modify roadway surface texture Overlay intersection approach Use near-side / far-side bus stop combinations Widen vehicle lane to accommodate bicycles Widen marked pedestrian crossing


								
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