Do side street greens or pedestrian indications come up immediately when a vehicle approaches the intersection or when a pedestrian pushes the push button?
No. As mentioned above, timing plans control the points in a cycle length when traffic signals will indicate red, amber or green. This time period is called a “window”. Vehicles or pedestrians input a call to the intersection controller via loop detectors or through pedestrian push buttons, indicating a particular movement needs to be serviced. If the calls are input prior to the window appearing in the cycle the call is serviced at the proper time. If the call is input after the starting point of the window, the particular movement must wait for the next window to occur before it will be serviced.
