United States Department of Transportation
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Develop Bridge Weigh-in-Motion Approach To Measure Live Loads on Texas Highways: Technical Report
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2023-11-01
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[PDF-22.37 MB]
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Edition:October 2019–October 2022
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Abstract:This research study developed and quantitatively evaluated the concept of Bridge Weigh-In-Motion (B-WIM) for future application on Texas highways. The primary objective of B-WIM systems is to instrument a bridge to obtain the axle information (i.e., weights, number, speed, and spacings) and weight information (i.e., axles and gross) of trucks that cross the structure. A secondary objective of B-WIM is to evaluate the bridge itself. The challenge of B-WIM is to accurately obtain this information through robust sensing technology and post-processing algorithms. B-WIM (compared to pavement WIM) is potentially less disruptive to traffic, more durable, more economical, safer to install, and able to produce accurate truck-traffic data and bridge assessment information. This project realized these advantages through the development of a B-WIM system that included extensive experimental testing followed by field validation on in-service bridges. The system was able to accurately identify truck axle and weight information. In addition, the project developed an approach to identify bridge parameters, such as distribution factors and composite action from B-WIM data. The final bridge evaluations included refined site-specific load ratings.
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