How can Pittsburgh’s Port Authority tackle a common public-transit problem?

According to Traffc21’s executive director, Stan Caldwell, the project’s goal is to figure out how to use “technology to improve a system rather than concrete.”  According to Caldwell, Surtrac will allow buses to communicate with traffic signals, indicating the route’s schedule and how full it is. Those factors will then let the signal make a decision to either prioritize the bus with a green light or slow it down with a red one.  Currently, progress has been slow. Surtrac has modernized some traffic lights in the East End, but the buses still can’t communicate with the lights.