How does Ann Arbor’s new bus-priority traffic signal work? Here’s a closer look at it

ANN ARBOR, MI — Ann Arbor’s first dedicated bus lane with a transit-priority traffic signal has been in operation two months, giving northbound buses going straight or turning left an edge over other traffic at State and William streets. White signals indicate buses can proceed and jump ahead while other traffic is stopped. But observers may notice there is not always a white transit signal ...