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  3. the answer needed is only for part c. a) willow an

The answer needed is only for part C. A) Willow and Stevens are two-way streets in...

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Civil Engineering

The answer needed is only for part C.

A) Willow and Stevens are two-way streets in an urban area. Afour-phase operation is used for the intersection of Willow andStevens with a cycle time of 110 seconds, including 15 sec Greenfor the left turn (LT) vehicles on each street. If the green timefor the through (TH) vehicles on Willow is 30 sec, determine thegreen time for the through (TH) vehicles on Stevens and constructthe signal timing cut-out diagrams for vehicles only withoutconsidering pedestrians. Assume a clearance (Yellow 3 sec + All Red2 sec) time of 5 seconds when the green light is switched betweenWillow and Stevens (but do not use the clearance time when thesignal changes from LT to TH on the same street. B) The width ofStevens Avenue is 52 feet. How long should be the Flash Don’t Walk(FDW) duration if the walking speed of pedestrians is 4feet/sec?

C) If the minimum headway is 2 sec, delay per phase is4.6 sec, and there are two through lanes and one left-turn lane onWillow in each direction, how long should be the cycle time if thecombined (LT + TH) traffic volume on this street is 3000vehicles/hour?

Answer & Explanation Solved by verified expert
3.8 Ratings (532 Votes)
its a 4 phase signalPhase 1 NBPhase 2 SBPhase 3 EBPhase 4 WBgiven minimum headway 2 seconds and delay per phaseTherefore saturation flow 36002 1800 vphplso for Willow Street total    See Answer
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