In Cambridge, MA one of the local bus' has the power to keep a light green longer than normal with the same/similar system: http://pb.cambridgema.gov/1bus http:

In Cambridge, MA one of the local bus' has the power to keep a light green longer than normal with the same/similar system: http://pb.cambridgema.gov/1bus http://pb.cambridgema.gov/1bus .