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.
(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)