Singer, Jeremiah (Westat), et al.
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This report discussed current and emerging technologies used to detect travel times and improve traffic management on rural roadways. A broad range of technologies were reviewed including Bluetooth, toll tag readers, in-pavement magnetic detectors, automatic license plate readers (ALPR), machine vision systems, radar/microwave/LIDAR systems, inductive loops, crowdsourcing, and cell phone signal monitoring systems.

To assess state–of–practice and identify lessons learned from experience, a literature search was conducted. The following lessons highlighted experience from a deployment in Minnesota where a real-time travel time information system was implemented to improve travel during roadway improvements on a 70 mile section of I-35 from Hinckley to Duluth, Minnesota. Using commercial off the shelf (COTS) software (TrafAlert™), MnDOT posted travel times on eight dynamic message signs (DMS), and a website with an online map. The following lessons were gathered from MnDOT staff and partners at the conclusion of the project in 2012.
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U.S. DOT Federal Highway Administration
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Travel Time on Arterials and Rural Highways: State-of-the-Practice Synthesis on Rural Data Collection Technology
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