If a four-phase operation is used for the intersection of Willow and Stevens wit

Question

If a four-phase operation is used for the intersection of Willow and Stevens with a time of 80 seconds, including 15 seconds for the turn (LT) vehicles on each street, 30 and 20 seconds for the through (TH) vehicles for Willow and Stevens, respectively, construct the signal timing cut-out diagrams for the vehicles. Assume a clearance (Yellow 3 sec + All Red 2 sec) time of 5 seconds and All Red is not used between LT and TH in the same direction. b. The width of Stevens Avenue is 52 feet. How long should be the Flash Don't Walk (FDW) duration if the walking speed of pedestrians is 4 feet/sec?

Explanation / Answer

b)

FDW duration = 52/4= 13 sec

for part a) please provide type of diagram

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