Pavement Design Guide Update

							Pavement Design
 Guide Update
    Paul Looney, P.E.
  KYTC Highway Design
  Top Ten Names for the Guide
10. Pavement Design Bible
9. The Little Black and White Book
8. The Pavement Code
7. All I Really Needed to Know About Concrete I
  Learned in Kindergarten
6. The Road Less Traveled
  Top Ten Names for the Guide
5. What to Expect When You’re Expecting Traffic
4. The Black Mile
3. All’s Well that Rides Well
2. Who Moved My Concrete?
1. Much Ado About Nothing
What took so long?
Clarify Some Information
Give Better Guidance
Allow Designers freedom, but still
     assist when issues arise
          What Projects Apply?
   Off the National Highway System
   Less than 20,000,000 ESALs
   Less than 15,000 ADT
   Less than 20% Trucks
      Who Should Use the Guide?
   District Designers
   Design Consultants
   Local Municipalities
        What Changes Were Made?
   Recommended Subgrade Stabilization
    Procedures (Design Memo 17-04)
     Guidance on use of Geogrids
     Incorporates new SN table for grids

   Flexible Structural Numbers Modified
       Conservatism removed
   Concrete Thickness Table Modified
       Added a table to reflect the use of treated drainage
        blanket
               Changes (cont.)
   Updated Life Cycle Cost Analysis Parameters
     Reflects most current pavement management data
     Reflects use of improved paving materials
     Where Can I Find the Guide?
   KYTC Highway Design Web Page
       http://transportation.ky.gov/design/pavedesign/PaveDesign.html
Pavement Design
  Spreadsheet
So easy, anyone can use it.
                       I’ll just get
                     Looney to do it.
Practical Solutions for
     Pavements
    Is the Guide Absolute?




“Thou shall place twelve inches of asphalt, a drainage blanket
      and DGA because the program sayeth it is so.”
                                  -Pavement Revelations 23:12
    Are there ways to reduce costs?
   What is the primary goal of the project
     Curve realignment
     Bridge Replacement
     Turning Lane

   Does it make sense to put 12” of asphalt for
    1000 feet between miles of 6” pavement?
   Do we need full 10-foot paved shoulders for a
    half mile when the rest of the roadway has 2-
    foot shoulders?
Consider Thicker Aggregate Sections
   3 inches of aggregate = 1 inch of asphalt
   DGA=$18/ton
   If asphalt base is > $54/ton then it may be more
    cost effective to use a thicker aggregate section
Pavement Type Selection
    Primary Goals for Pavement Type
               Selection
   Cost Effective Pavements
   Provide Well-Performing, Durable, Safe
    Pavements
   Provide Fair and Equitable Treatment between
    Paving Industries
    Why Is Type Selection Important?
   Total Highway Construction Costs are up 27%
    since 2003
   Federal Gas tax rate of 18.3 cents/gallon has not
    changed since 1993
     Current buying power is 11.6 cents/gallon
     36% reduction in buying power

   Liquid Asphalt price up 380% since June 2005
                                                 $/ton




                      100
                            200
                                           300
                                                  400
                                                                500
                                                                      600
                                                                            700
                                                                                       800




                  0
        Feb-05


        May-05
                                  183.62

         Jul-05


        Oct-05


        Jan-06


        Mar-06


        Jun-06

                                                        391.2
        Aug-06


        Nov-06
                                                                                                      2005-2008




Month
        Feb-07


        Apr-07
                                                                                             Kentucky Asphalt Price Index




         Jul-07


        Oct-07


        Dec-07


        Mar-08


        Jun-08

                                                                                  697.75
        Aug-08


        Nov-08
                                        Average Asphalt Bid Prices in Kentucky
                                                     2005-2008

        90

                                                                                               Avg AC Surf $78/ton
        80


        70


        60
                                                                                                     Avg AC Base $65/ton
                Avg AC Surf $47/ton
        50
$/ton




        40
                          Avg AC Base $43/ton

        30


        20


        10


         0
         2004                    2005                  2006                   2007                      2008               2009
                                                                  Year

                        CL2 AB 1.0D PG64-22     CL2 AS 0.38D PG64-22     CL3 AB 1.0D PG64-22      CL3 AS 0.38D PG64-22
         Primary Considerations
   Traffic
     ADT
     Truck %

   Soil Characteristics
   Construction Considerations
     Maintenance of Traffic
     Speed of construction
           Primary Considerations
   Cost
     Initial Cost
     Life-Cycle Cost
             Secondary Factors
   Performance of similar pavements in the area
   Adjacent pavements
   Stimulation of competition
        Alternate Pavement Bidding
   Other factors indeterminate
   Costs within reasonable percentage
       10% to 20%
   Anticipate single bidder
When Do I Update a
     Design?
              Traffic Changes
   Is the ESAL forecast more than 3 years old?
   Has the design template changed?
     4-lane to 2 or 3-lane
     Curb and Gutter added
    Changes in Materials Warrants
   ESAL Class designation changes
   Asphalt surface aggregate changes
   Asphalt surface lift thickness changes
   Polish-resistant aggregate warrant changes
   PG binder designation changes
         Asphalt Binder Change
   No more PG76-22 binder is to be specified
   Shortage of butadiene necessary to produce
   No timetable for when PG76-22 may be
    specified again
        Design Procedure Changes
   Before you set your final grade check the age of
    your pavement design
       If more than one year old check online
   Latest version posted 4/28/08
    What needs to be resubmitted?
   Only what has changed
     Traffic Forecast
     Geotechnical Report

     TC61-29

   You don’t need to resubmit a whole new folder
Who’s in the Pavement Branch?


     GOOD QUESTION!!
           Pavement Branch
   Dan Hite, TEBM
             Pavement Branch
   Dan Hite, TEBM
   Leo Frank, TE Specialist
             Pavement Branch
   Dan Hite, TEBM
   Leo Frank, TE Specialist
   Paul Looney, TE Specialist
             Pavement Branch
   Dan Hite, TEBM
   Paul Looney, TE Specialist
   Leo Frank, TE Specialist
   Joe Tucker, TE I




                                 Photo Submitted
             Pavement Branch
   Dan Hite, TEBM
   Paul Looney, TE Specialist
   Leo Frank, TE Specialist
   Joe Tucker, TE I
   Joette Fields, TET III
Questions?
Paul.Looney@ky.gov
   (502) 564-3280