<P> Walk time provides the length of the walk indication . </P> <P> Flashing Don't Walk is the duration of the flashing pedestrian clearance . This is timed as the length of the crosswalk divided by a speed of 3.5 feet per second . </P> <P> Cycle Length controls the time from one major street green to the next major street green for purposes of coordination . It is often set by the master controller for the particular plan used . This is also used if the signal has no detectors attached . </P> <P> Offset controls the timing of the start of the major street green and / or the end of the major street green, to keep the signal in coordination with other signals in the overall timing plan . This timing can be set by the master controller for the particular plan used . </P>

What does it mean to time a traffic light