1. A signalized intersection has a cycle length of 70 seconds. For one traffic movement, the displayed all-red time is set to 2 seconds while the displayed yellow time is 5 seconds. The effective red time is 37 seconds and the total lost time per cycle for the movement is 4 seconds. What is the displayed green time for the traffic movement?
a) 30 s b) 31 s c) 33 s d) 65 s
2. An isolated pretimed signalized intersection has an approach with a saturation flow rate of 1900 veh/h. For this approach, the displayed red time is 58 seconds, the displayed yellow time is 3 seconds, the all-red time is 2 seconds, the effective green time is 28 seconds, and the total lost time is 4 s/timing stage. What is the average uniform delay per vehicle when the approach flow rate is 550 veh/h?
a) 26.3 s b) 29.7 s c) 30.1 s d) 413.3 s
3.An isolated pretimed signalized intersection has an approach with a traffic flow rate of 750 veh/h and a saturation flow rate of 3200 veh/h. This approach is allocated 32 seconds of effective green time. The cycle length is 100 seconds. Determine the average approach delay (using Eq. 7.27).
a) 4.6 s b) 30.2 s c) 34.8 s d) 35.0 s
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