You are here

Development of New Default Traffic Datasets for the Mechanistic-Empirical Pavement Design Guide Using the Data from Long-Term Pavement Performance Specific Pavement Study Traffic Data Collection Pooled Fund Study, TPF-5(004)

Project Information

Project ID: 
FHWA-PROJ-09-0045
Project Status: 
Completed
Start Date: 
Wednesday, September 30, 2009
End Date: 
Wednesday, May 30, 2012
FHWA Program: 
Infrastructure
FHWA Subprogram: 
Long-Term Infrastructure Performance
FHWA Activity: 
Long-Term Pavement Performance
FHWA Topics: 
Roads and Bridges--Design
TRT Terms: 
Weigh in Motion; Infrastructure; Research; Pavements; Traffic; Roads; Measuring Methods
FHWA Discipline: 
Design, Pavement and Materials, Planning
TRB Subject Area: 
Data and Information Technology, Design, Highways, Pavements, Research

Contact Information

First Name: 
Deborah
Last Name: 
Walker
Telephone: 
(202) 493-3068
Email Address: 
Team: 
Long-Term Infrastructure Performance Team
Office:
Office of Infrastructure Research and Development
Office Code: 
HRDI-30

Project Details

Project Description: 

The default traffic datasets for the National Cooperative Highway Research Program (NCHRP) Project 1-37A (the MEPDG) were based on the Long-Term Pavement Performance (LTPP) traffic data available in 1998. According to the 1999 interim report, “The Development of the 2002 Guide for the Design of New and Rehabilitated Pavement Structures,” the quantity and quality of these data were less than expected. Since that time, the LTPP Traffic Data Collection Pooled Fund Study, Transportation Pooled Fund (TPF)-5(004), has greatly increased the quality and quantity of traffic data available through LTPP.

Goals

Many pavement construction projects cannot justify the collection of site-specific weigh-in-motion (WIM) data solely for design purposes. Therefore, use of WIM data from other sites or default traffic values is not uncommon. The Mechanistic-Empirical Pavement Design Guide (MEPDG) is sensitive to traffic inputs and the existing default traffic values are inadequate. This project will rectify this situation with the high-quality traffic data now available from the Long-Term Pavement Performance (LTPP) project.

Partners and Other Sponsor/Managing/Performing Organizations: 

Deliverables

Deliverable Name: 
New Traffic Default Datasets
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
This project will use the data from the Long-Term Pavement Performance (LTPP) Specific Pavement Study (SPS) Traffic Data Collection Pooled Fund Study to develop new default datasets for the Mechanistic-Empirical Pavement Design Guide (MEPDG).