Respuesta :
Answer:
A traffic signal has a 60-second cycle length. For the travel direction of interest, the effective red and green times are 30 seconds each, the arrival rate is constant at 20 vehs/min and the saturation flow (i.e., the queue discharge rate) is 1 veh/sec.
a. Calculate the average delay (in seconds) for the travel direction of interest
b. What is the maximum length of a queue (in vehicles)?
c. Assume that works on the street are taking place downstream of the intersection so that only 20 vehs/min (in the direction of interest) can pass. Calculate the average delay [sec] caused by the street work to a vehicle leaving the intersection. Assume that the queue at the downstream restriction never backs-up into the intersection. (Hint: Utilize Input-Output Curves)
