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A traffic signal operates with a 60 seconds cycle length. On the Eastbound approach, traffic arrives...

A traffic signal operates with a 60 seconds cycle length. On the Eastbound approach, traffic arrives at a constant rate of 20 vehicles/minute. The saturation flow is 1 vehicle/second. The effective green time is 30 seconds. Calculate the following:

a. The degree of saturation (v/c ratio)

b. The capacity on the approach

c. The spare capacity (%)

d. The average delay to all vehicles

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