Welcome!Please make sure to mute your microphone and disable your webcam.

Comments/questions should be placed into the chat feed.Comments/questions will be answered at the end of each topic.

Pavement Designs and PackagesOffice of Materials and TestingPavement Management Branch

Ian Rish P.E., State Pavement Engineerirish@dot.ga.gov

PavementManagement@dot.ga.gov404-608-4849 (Direct) or 404-608-4770 (Main)

TopicsWhat we will discuss today?• Design Policy Manual• Plan Development Process• TIA• Pavement Design Manual• Pavement Design Packages

AcronymsSome Useful Terms• Design Policy Manual (DPM)• Equivalent Single Axel Load (ESAL)• Graded Aggregate Base (GAB)• Jointed Plain Concrete Pavement (JPCP)• Multi Unit (MU), Single Unit (SU)• Plan Development Process (PDP)• Pavement Evaluation Summary (PES)• Pavement Type Selection (PTS)• State Pavement Engineer (SPE)

Design Policy Manual Where is information located?GDOT External Website – ROADS – Roadway Design – Design Policy Manual

Design Policy Manual Chapter 10 Pavement Topics• Design Resources and Considerations• Alternate Pavement Bid Process• Rigid Pavement• Flexible Pavement• Temporary Pavement• Composite Pavement• Shoulders• Roundabouts• Driveways

Design Policy ManualDesign Resources and Considerations• 20 year design period• Traffic volumes should include a +2 for potential schedule changes• When no MU or SU breakdown for percent trucks is given in the approved traffic see

Table 10.2 for the ESAL Factor to use in pavement design analysis. • For asphalt widening it is recommended that no less than half of the existing asphalt

lane remain in place. This will allow for a clean longitudinal joint and the joint will not be in the wheel path. Wheel paths on a joint will cause accelerated deterioration of the pavement structure.

Design Policy Manual Alternate Pavement Bid Process• Process applies to more than just a PTS. Alternate bid also covers the use of

alternate base materials. Typically only Districts 2, 3, 4, and 5. • To determine if alternate bid applies to your project refer to the PTS Manual, PDP

Chapter 5, and 6.

Design Policy ManualRigid Pavement• Section 430 Pay Items are for large projects > 50,000 SY. For projects under 50,000

SY Section 439 Pay Items should be used. • GAB thickness under Concrete Pavement should be 8” (10.3.6 Pavement Bases)• Interlayer used primarily on Interstate, but may also be used where large truck

volumes exist on State Routes with JPCP. Interlayer is Required for CRCP.• JPCP joints and dowels in accordance with detail 5046H

Design Policy ManualFlexible Pavement• Revised Flexible Underdesign Policy

based on State Route Prioritization• Maps are located on external website

Design Policy ManualTemporary Pavements• Temporary pavements are to be designed for the Base Year and should include a +2

design. Base Year = Let Date + Construction Duration• Temporary Pavement uses Terminal Serviceability Index (TSI) of 2.0 if the pavement

will be removed and not included in the permanent structure. If it will be included in the permanent structure the pavement must include lime, and match the permanent pavement underdesign target. TSI must be manually changed in the pavement design program.

• Minimum Temporary Pavement Structure information in 10.6.3

Design Policy ManualComposite Pavements• We do not recommend creating new composite pavements

Design Policy ManualShoulders• 4 feet or less match full depth of mainline, otherwise see Detail S-4

Design Policy Manual Roundabouts• JPCP should be considered as the pavement type used for Roundabouts. However, if

Asphaltic Concrete Pavement is used the surface course should be 12.5 mm Superpave with polymer modification.

• When constructing a roundabout the JPCP or 12.5 mm Superpave with polymer modification should extend to the beginning of the splitter island on each approach of the roundabout.

• OMAT Preference for JPCP is due to the slow turning movements of vehicles as they enter and proceed through the roundabout. Asphalt is a viscoelastic material and deforms the most under low frequency high impact loads.

• Currently no JPCP design is provided in detail RA-2

Design Policy ManualDriveways• Driveway structures can be found in 10.10.2

Questions on DPM?Coming up next• Plan Development Process• TIA• Pavement Design Manual• Pavement Design Packages

Plan Development ProcessWhere is information located?GDOT External Website – ROADS – Manuals & Guides – Plan Development Process –Plan Development Process Manual

Plan Development ProcessKey Chapters• Chapter 5 – Concept• Chapter 6 – Preliminary Design• Chapter 7 – Final Design• Chapter 10 – State Funded• Pavement Design and Approval Process Flowchart

Plan Development ProcessConcept• An Initial PES should be performed for projects that will require a full PES in

Preliminary Design. See 6.3.4 to determine if a PES is required. • Default assumption should be that the pavement CANNOT be retained. • Include all pavement alternates that apply in the plans until a PTS has been

completed.• Projects with full-depth pavement of less than one continuous mile should match the

existing pavement type at the begin and end of the project. These projects do not require a PTS and are not subject to alternate bid.

• See section 5.9 for additional detail

Plan Development ProcessPreliminary Design• PES criteria can be found in Section 6.3.4• PES reports shall include all designs necessary for the project. This includes all full

depth and temporary pavement designs. Including all of these items in the PES reduces duplication of efforts by removing the need for a separate Pavement Design Package for projects that have a PES.

• Overlays do not require approval if a PES is not required. Keep in mind that any overlay done without a PES should be functional in nature. If there are concerns about the pavement structure a PES should be performed even if it is not required.

• TE and LCI Exemptions Memo• Submission of PES per Pavement Management Submission Process

Plan Development ProcessPreliminary Design• Pavement Design Packages should be approved before PFPR and submitted per the

Pavement Design Submission and Approval Process.• Check the Guidelines for Minor Pavement Projects. Pavement Design Package for

Minor Projects may be submitted, but only if they are different from the guidelines.• Pavement Designs should be approved before requesting a PTS.• PTS is not required for projects with less than 1 mile of full-depth pavement

Plan Development ProcessFinal Design• Check dates of your designs to make sure they are still valid before FFPR.• Pavement continues to deteriorate after PES has been performed. Therefore PES

has a life span, aka an expiration date.• GDOT PMs have access to GDOT 411 Dashboard that details information on

Pavement Design Packages and PES dates.

Plan Development ProcessState FundedRead Chapter 10.2.6 of the PDP. This section covers when PES, PTS, and Designs do/do not apply based on State Funds. Aspects that determine application of policies are:• On/Off System• National Highway System• Federal Funds

http://www.dot.ga.gov/PartnerSmart/DesignManuals/PlanDevelopmentProcess/Pavement%20Design%20and%20Approval%20Process.pdf

Questions on PDP?Coming up next• TIA• Pavement Design Manual• Pavement Design Packages

Transportation Investment Act (TIA)Where is information located?TIA Website

TIAA Different Process• TIA projects have a different process, especially ones that are 100% TIA• TIA Manual• Program Manager - PgM

Questions on TIA?More coming up next• Pavement Design Manual• Pavement Design Packages

Pavement Design ManualWhere is information located?GDOT External Website – ROADS – Manuals & Guides – Materials – Pavement Design Manual

Pavement Design ManualReference most used• LDF Table • Historic SSV• Subgrade k-values based on SSV• Regional Factors• Base Thickness per SSV• Base alternative equivalents DPM Chapter 10

Questions on PDM?Coming up next• Pavement Design Packages

Pavement Design PackagesWhere is information located?GDOT External Website – Design Software – ProjectWise – Workflows – Pavement Design and Submission Process

Pavement Design PackagesSubmission and Approval Process• Submission process contains links to all required items and where to place

documents in ProjectWise• All inquiries and requests go to PavementManagement@dot.ga.gov

Pavement Design PackagesMinor Projects• GDOT External Website – ROADS – Manuals & Guides – Materials• Guidelines for Minor Pavement Projects• Guidelines for Minor Pavement Projects Tool (Submit for proof at PFPR)• Temporary Pavements for Minor Pavement Projects• If your project meets the guidelines you can use what is provided or submit a different design

in a Pavement Design Package for approval. Do not submit design packages that use the same designs that are provided in the guidelines.

• Due to recent changes in the flexible pavement underdesign policy, lower priority routes might have pavement designs that meet the underdesign target that are thinner than the guidelines.

Pavement Design PackagesChecklist Tips• PM is the GDOT PM• Order of Package should be order of Checklist• Pavement Project Description should match the designs provided• Overlays that are structural in nature are provided in a PES, not in package• The surface course used for functional overlays, such for tie-ins or mainline when a

PES is not required can be mentioned

Pavement Design Packages100% Digital Process• ProjectWise• Bluebeam • PDFs

• No scanning necessary, you can “print” to PDF• Plans can be ANY size, we are not printing anything• Flatten your file, this removes any markups/comments you have made• Do all work in the PDF before any signature is applied• This also includes adding all Signature Fields before any signature is

applied, this counts as a change to the file

Pavement Design PackagesDigital Signatures

Pavement Design PackagesTraffic• Must have approval letter if done by consultant• Only include build traffic, and +2 pages for full depth designs (No DHV or No-Build)• Only include the existing traffic when submitting temporary designs• Use highest ESAL scenario• If side road does not have truck percentage, use the mainline truck percentage• If the let date plus construction duration no longer matches your approved base year

traffic use your +2 designs and state this in pavement project description

Pavement Design PackagesBridge Project Design Traffic• Bridge Project Design Traffic Forecasts are

usually 2-way

Pavement Design PackagesMix Guidelines• GDOT External Website – ROADS – Manuals & Guides – Materials• Criteria for Use of Asphaltic Concrete Layer and Mix Types 1-19-18• Design Year two-way traffic should be used to determine the appropriate mix type• AADTT is now used instead of truck percentage• Take note of the maximum thickness of each layer• Think of construction sequences when finalizing your designs

Pavement Design PackagesRevised Flexible Underdesign Targets• GDOT External Website – ROADS – Manuals & Guides – Materials• Revised Flexible Pavement Underdesign Policy Based on State Route Prioritization• All full depth flexible pavement designs for routes categorized as Critical or High shall have an

underdesign target of 5%• All full depth flexible pavement designs for routes categorized as Medium, Low, or routes that

are Off-System shall have an underdesign target of 10%• All flexible inlay, overlay, and temporary pavement designs regardless of priority shall have an

underdesign target of 15%• All flexible pavement designs shall use this updated policy for all projects that do not have

approved pavement designs as of July 1, 2019

Pavement Design PackagesConcrete Pavement Design Targets• JPCP is preferred over CRCP• Balanced thickness rounded to nearest half inch to account for future grinding with a

maximum thickness of 12”• GAB thickness = 8”• 430/439 Pay Items

Pavement Design PackagesCommon Errors• Incorrect Surface Course Layer Mix Type (AADT, AADTT)• Traffic Approval Letter (Required unless traffic done by GDOT)• Traffic Diagrams (Build only unless temporary designs included)• Traffic Assignments for Bridge Projects (Two-Way AADT is listed)• Construction Duration is not the same on checklist vs the pavement description• Base/Design Year is incorrect based on Let date• Temporary Designs have years that don’t match let and open years based on the full

depth designs and construction duration. Also, include +2 Temporary when providing +2 Full Depth

Questions or Feedback?Now is your chance!