This study describes the analysis of truck volume data collected by the Washington State Department of Transportation (WSDOT) over four and one half years, from 1988 through 1993. The primary objectives of this research were to: investigate the patterns in truck volumes at various locations in Washington State; determine whether seasonal factors can be developed and applied to short-duration truck volume measurements to better estimate average annual conditions; develop procedures for routinely calculating and applying these values in Washington; develop an easy procedure that other states can use to create their own seasonal factoring process, and produce a guidebook that explains this process and lists the necessary steps clearly and concisely.
This report presents the findings for all but the last of these objectives; this last objective is met in another report.
Washington State Transportation Center (TRAC)
Adjustment factors, Pavement management systems, Seasons, State departments of transportation, Traffic counts, Traffic volume, Travel patterns, Trucks, Vehicle classification, Weight.