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Research Reports

Truck Flows and Loads for Pavement Management


This report describes procedures state departments of transportation can use to determine the location and frequency of their truck monitoring activities. The objective of the recommended procedures is to help a state design a program that cost-effectively meets its needs for traffic data within its overall pavement management structure. If the data are collected and used properly, they should provide a much more effective pavement design and management process than is currently available, thereby increasing the reliability of pavement designs; decreasing overall pavement construction, maintenance, and rehabilitation costs; and improving a state's ability to manage its pavement infrastructure.
This summary report discusses:

  • the procedures required to determine the number and distribution of continuous, automatic vehicle classification (AVC) and weigh-in-motion (WIM) devices within a state;
  • a system for using the data gathered with these devices to adjust data from short duration vehicle classification and WIM counts to better estimate average annual conditions;
  • the appropriate length of short duration AVC and WIM counts required to develop annual average estimates of travel within specified levels of precision and
  • research performed in Florida and Washington that illustrates the variability of vehicle classification and truck weight data that states can expect to find on their roads.

  • Date Published: January, 1994
  • Publication Number: WA-RD 320.1
  • Last Modified: October 23, 2007
  • Authors: Mark E. Hallenbeck, Amy J. O'Brien.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 48 p., 1,250 KB (PDF)
  • Subject: Automatic vehicle classification, Automatic vehicle monitoring, Data collection, Highway capacity, Pavement management systems, State departments of transportation, Traffic counts, Traffic flow, Trucks, Vehicle classification, Weigh in motion.
  • Keywords: Pavement management systems, truck counts, traffic counting, Washington (State)
  • Related Publications: Truck Loads and Flows, (WA-RD 320.2).
    Final Technical Report for Task A: Truck Loads and Flows, (WA-RD 320.3).

This abstract was last modified April 29, 2008