GATE 2023 AR — Planning – Question 53

Urban Land Use and Transportation · Design of roads, intersections, grade separators and parking areas · 1 mark · Multiple choice

What is the correct sequence in traffic-signal design?

Phase design → green allocation → cycle length
Green allocation → cycle length → phase design
Cycle length → phase design → green allocation
Phase design → cycle length → green allocation

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Show answer and explanation

Correct answer: (D) Phase design → cycle length → green allocation

Explanation

First identify compatible movements and phases. Then estimate the appropriate total cycle using traffic demand and lost time, and distribute effective green among phases. This yields D. Green shares cannot be finalised before establishing the phase structure and available cycle time.

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