Question

For the given intersection, lost time is equal to 3.5 sec per phase and Y+AR is equal to 3 sec. Width of each lane is 10 feet.

425 110 300 130 80 380 95 440

Estimate the signal timings for the intersection assuming a four phase operation.

Phase A: serves north - south left turns only

Phase B: serves north - south traffic (no left turns permitted)

Phase C: serves east - west left turns only

Phase D: serves east - west traffic (no left turns permitted) Assume the prevailing saturation flows as follows: s(TH+RT) = 1600; s(LT) = 1200

Answer 1

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2 43,2 13 ses RI 78 Phase-A 11 2 Phase-B 1 31 24S R3 Phasa-c 4 6 3 2 30 Co 2912