Advancing the State of Bridge Weigh-In-Motion for the Connecticut Transportation Network
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2017-08-01
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Edition:July 1, 2014 – June 30, 2017
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Abstract:Bridge Weigh-In-Motion (BWIM) uses the dynamic response of a bridge to determine gross vehicle weight, speed, and axle spacing of truck traffic to quantify the loads in a transportation network. The advantage of BWIM is that it does not require the installation of sensors in the pavement nor use any axle locators in the roadway. Research in BWIM methods has been conducted in Connecticut since 2004, with the goal of moving this technology closer to deployment in Connecticut. The benefits of BWIM can be realized for the design and management of pavements and results in less risk and increased cost savings. Improved oversize/overweight truck permitting, bridge load rating and truck re-routing enable informed decisions and improved expectations of performance that translate into sound investment decisions for the Connecticut Department of Transportation (CTDOT). With this goal, this project has continued BWIM data collection at the Meriden (I-91) Bridge, making data collected since 2013 available to CTDOT in a queryable format and providing a testbed for further improvement and understanding of BWIM data processing and bridge monitoring techniques in general. Further, the project has developed a portable monitoring system in two configurations that can be deployed for BWIM purposes in Connecticut, for a single day or multiple month durations. As part of the project, these BWIM systems were deployed on various bridge types in Connecticut to identify best practices and evaluate performance and potential for application by CTDOT. The project has moved the state of knowledge and practice of BWIM in Connecticut to enable deployment of this technology by CTDOT.
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