GATE CE 2022 Set 1 — Question 62
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Transportation Engineering → Intersections & Signals → Traffic Signals
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Question
A two-phase signalized intersection is designed with a cycle time of . The amber and red times for each phase are and , respectively. If the total lost time per phase due to start-up and clearance is , the effective green time of each phase is ______s. (in integer)
Correct answer
48 to 48
Solution
1.Determine the total time for Green and Amber per phase:
In a two-phase signal, the cycle time is the sum of the green, amber, and red times for any single phase: .Given and Red time .
Therefore, .
2.Calculate the effective green time ():
The effective green time is defined as the actual green time plus the amber time minus the lost time per phase ():Given .
.
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