Pittsburgh spent $8 million in the 1990s on an automated, high-tech downtown traffic-signal control system. Several years ago, it spent millions more for an update. That system never has been fully activated.

Peduto and Fitzgerald say they will seek help from Carnegie Mellon University researchers to extend cutting-edge technology for “smart” traffic signals that already have improved traffic flow at nine intersections in East Liberty. Baum Boulevard and Centre Avenue are next, then Penn Avenue to the east, providing an “intelligent transportation corridor” between Wilkinsburg and downtown via Bigelow Boulevard.

Pittsburgh Magazine: Getting Around in the 24-Hour City