41.5. Cycle time

Try these first

1. 1.

   Define cycle time in traffic signal design.

   Hint

   Think about the signal's operation duration.

2. 2.

   What does headway refer to?

   Hint

   Focus on the timing of vehicles in a sequence.

3. 3.

   What is cycle time in traffic signals?

   • A. Duration of green light
   • B. Total time for all signals
   • C. Time for vehicle stops

   Hint

   Think of the overall time taken for all traffic lights.

4. 4.

   True or False: Headway is the same for all vehicles at an intersection.

   • True
   • False

   Hint

   Consider varying distances and starting times.

5. 5.

   Given a saturation headway of 1.5 seconds, how many vehicles can pass in an hour if the traffic light remains green? Assume the green time is uninterrupted.

   Hint

   Consider the relationship between headway in seconds and flow in hours.

6. 6.

   A traffic signal has a cycle length of 80 seconds with a green time of 35 seconds, yellow time of 5 seconds, and total lost time of 6 seconds. Calculate the effective green time.

   Hint

   Add green and yellow times, then deduct lost times.