What does a transit priority signal look like when it is on top of your regular traffic signal?

When a transit priority signal is located on top of a regular traffic signal, it is designed to provide clear communication to drivers regarding the right-of-way for transit vehicles, such as buses or streetcars. The correct appearance of this signal consists of a white vertical bar on a dark background. This visual cue is specifically intended to be easily recognized and understood by road users, ensuring that they yield to transit vehicles when the signal is active.

The use of a vertical orientation and the white color against a dark backdrop distinguishes it from standard traffic signals and enhances visibility, particularly in various weather and lighting conditions. The design is also aimed at minimizing confusion at intersections where both vehicular and transit traffic intersect, effectively streamlining transit operations and improving overall traffic flow.