Liao, Chen-Fu and Brian Davis
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This project leveraged the smartphone-based accessible pedestrian system (APS) developed by Minnesota DOT and extended previous work by installing the system at four signalized and two un-signalized intersections located in downtown Stillwater, Minnesota. Researchers interfaced with the traffic controllers to broadcast traffic signal phasing and timing (SPaT) information through a secured and private wireless network for visually impaired users. Bluetooth Low Energy (BLE) technology was used to identify a person’s GPS coordinates when traveling and ensured that the person was in the right location. The project’s main goal was to test the smartphone-based accessible system and evaluate the efficiency of the system for visually impaired individuals, through signalized and un-signalized intersections.

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MN 2020-28
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Prepared by the University of Minnesota for the Minnesota DOT
Result Type
Deploy and Test a Smartphone-Based Accessible Traffic Information System for the Visually Impaired
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