CMU develops high-technology traffic signal timing system

Carnegie Mellon University has developed a first-of-its-kind traffic signal control technology that automatically adjusts and coordinates signal timing to accommodate varying traffic volumes and has shown strong promise for reducing commuting times and vehicle emissions during a pilot trial at nine intersections in East Liberty.
At a news conference Monday in East Liberty next to one of those intersections, CMU researchers said the smart traffic signal system, in place since June, has reduced vehicle wait time on Penn Avenue, Penn Circle South and Penn Circle East, by an average of 40 percent. Travel time through the area declined by 26 percent and vehicle emissions are down an average of 21 percent.