The effective green time per phase at a signalized intersection is the actual green time plus:
Choose the correct answer
Red time only
Yellow time only
All-red time only
A portion of yellow (amber) time minus the start-up lost time
Correct Answer
D. A portion of yellow (amber) time minus the start-up lost time
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Effective green = actual green time + yellow time - lost time. In Webster method: effective green = actual green + amber - start-up loss (typically 2 s each component). Effective green is used in capacity calculation: capacity = s x g/C.
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