Document Type


Publication Date



Traffic monitoring -- United States -- Oregon, Transportation -- Planning -- Assessment Tools, Intelligent transportation systems, Oregon Department of Transportation

Physical Description

1 online resource (64 p.)


Weigh-in-motion (WIM) systems have provided an effective means of data collection for pavement research and facility design, traffic monitoring, and weight enforcement for over 40 years. In weight enforcement, WIM systems have been increasingly used to screen potentially overweight vehicles. Vehicles that exceed weight limits as measured on a WIM scale are then weighed on a static scale, which is subject to accuracy standards specified by the National Institute of Standards and Technology (1998). The use of WIM for screening purposes reduces queuing at weigh stations, resulting in considerable savings for both truckers and enforcement agencies. To date, however, WIM systems have not been certified for direct applications to weight enforcement.


Catalog Number PR108.

Published by the Center for Urban Studies, College of Urban and Public Affairs, Portland State University.

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