Carnegie Mellon University’s East End traffic effort turns to pedestrian safety

Officials say the system has reduced vehicular emissions by 21 percent and travel times by 25 percent overall. The midday wait time for a green light was almost cut in half. The catch, and potential hazard, is that green arrows for cars light up at the same time the walking figure lights up for pedestrians.
CMU researchers are working on perfecting a pedestrian detection model and have a test mechanism already installed on Penn Circle at Collins Street and at Eastside.
A bus detection model will follow next month at Collins, said Stephen Smith, director of the Intelligent Coordination and Logistics Laboratory at CMU’s Robotics Institute.