Pittsburgh boasts a comparable technology with Scalable Urban Traffic Control, or Surtrac, an artificial intelligence-based system… Like adaptive traffic signals, Surtrac, which was deployed at intersections in East Liberty earlier this year, responds in real-time as opposed to working on a fixed-time cycle. While the system operates similarly to PennDOT’s adaptive signals, Traffic 21 Executive Director Stan Caldwell explains that Surtrac is designed for urban grids.

“There are other adaptive signal technologies out there — commercial ones — that work mostly with suburban arterials, where you have a major flow of traffic in one direction or the other. In morning rush hour, everyone’s going one way; in evening rush hour, everyone’s going the other way,” says Caldwell. “But take a more complex area like East Liberty where you have traffic coming on Penn, you have traffic coming on Highland, you have traffic coming from all different directions at different times of the day, this system can automatically adapt each light cycle.”

So far, results from Surtrac’s deployment demonstrate a reduction in travel time by 25 percent, a reduction in wait times by 40 percent, and a 20 percent decrease in emissions. The system will significantly increase its network by next spring, covering 50 major intersections in the East End from Braddock Avenue up through Craig Street.

See the original report at Popcity.