U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590

Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations



Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-04-0002
Project Name:   Maintenance and Data Services for Long-Term Pavement Performance (LTPP) Weigh-in-Motion (WIM) Systems
Project Status:   Active
Start Date:  September 22, 2011
End Date:  September 21, 2015
Contact Information
Last Name:  Walker
First Name:  Deborah M
Telephone:  202-493-3068
E-mail:  deborah.walker@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Long-Term Pavement Performance Team [HRDI-30]
Program:   Long-Term Pavement Performance
Project detail
Roadmap/Focus area(s):   Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:   This multiyear study will attempt to collect research-quality data by installing a Bending Plate, Load Cell, or Quartz Sensor at as many of these Specific Pavement Study (SPS) sites as economically possible. For the purpose of this study, research quality data is defined to be at least 210 days of data (in a year) of known calibration meeting the Long-Term Pavement Performance (LTPP) precision requirements for steering and tandem axles, gross vehicle weight, speed, and axle spacing.
A core objective of the Long-Term Pavement Performance (LTPP) Specific Pavement Study (SPS) is to understand and quantify the relationship between pavement performance, truck volumes, and axle loadings. The objective of this pooled fund study is to improve the quality and increase the quantity of monitored traffic data (volumes, classifications, and weights) at the SPS-1, -2, -5, -6, and -8 test sites. There are a total of 64 SPS-1, -2, -5, and -6 test sites and 20 SPS-8 sites throughout North America.
More Information URL(s):  
  1. http://www.pooledfund.org/Home/Index
Product Type:   Data
Test Methodology:   This contract represents phase II, which involves determining if a site is suitable for installing a Weigh-in-Motion (WIM) system, installing and maintaining a new WIM system, performing the initial calibration for a newly installed WIM system, downloading and performing verification checks for the previous day’s data for the site, and providing a five-year warranty of the system after acceptance of the site by the Federal Highway Administration (FHWA). Information on the phase I activities for this project can be found under the title “Field Calibrations and Validations for Long-Term Pavement Performance Weigh-in-Motion Systems.”
Partners:   Federal Highway Administration: Office of Policy and Governmental Affairs - Office of Highway Policy Information; Role(s): Advisory, Technical
Expected Benefits:   The expected benefit is quality traffic data.
Deliverables: Name: Fully Operational Weigh-in-Motion (WIM) System
Product Type(s): Software, Hardware, Data
Description: The contractor is responsible for providing a fully operational Weigh-in-Motion (WIM) system that collects quality WIM data according to the Long-Term Pavement Performance's (LTPP's) precision requirements. The WIM system is installed at select LTPP Specific Pavement Study (SPS) test sites.
FHWA Topics:   Roads and Bridges--Design
TRT Terms:   Calibration
Weigh in Motion
FHWA Disciplines:   Design
Pavement and Materials
Subject Areas:   Design
Vehicles and Equipment
Freight Transportation


Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101