UW Health Sciences Express Bus (IMAGE) University of Washington Caption University of Washington transportation engineers have developed an inexpensive system to sense Wi-Fi and Bluetooth signals from bus passengers' mobile devices and collect data to build better transit systems. They tested it on UW shuttle buses last spring. Credit University of Washington Transportation Services Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.