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Measure of Truck Delay and Reliability at the Corridor Level

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Status:  Complete
Report Date:  04/18/2018


Traffic overcapacity on Twin Cities metropolitan area (TCMA) roadways causes frequent congestion and delay for freight truck traffic. Building on their previous study identifying bottlenecks in TCMA corridors, researchers obtained very detailed data from the National Performance Management Research Data Set (NPMRDS) for selected traffic corridors in the TCMA to learn where and when congestion develops. Their precise tools and metrics revealed important information about truck mobility on different kinds of roadways, truck reliability on corridors during AM and PM peak periods, and the exact locations and extent of the delays within the TCMA highway system. Causes for some of the bottlenecks are insufficient capacity, increasing demand, roadway geometry and density of weaving points (on- and off-ramps). Further research would examine mitigating strategies.

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