A hazardous material spill on Interstate I-76 caused the eastbound traffic 20-minute delay. Traffic flow is...

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Civil Engineering

A hazardous material spill on Interstate I-76 caused theeastbound traffic 20-minute delay. Traffic flow is completely shutdown on a three-lane section creating a jam density of 160vpm/lane.If the arriving flow on this roadway section is 3300vph at adensity of 35 vpm/lane, determine the following:
a) the total number of vehicles in the queue and the queuelength (miles) after 20 minutes.
b) spacing (in ft/Veh) between vehicles in the jammedtraffic.
c) if the roadway is re-opened after 20 minutes and thereleasing flow at the bottleneck is 1800vph/lane at a density of60vpm/lane, how long will it take for the releasing wave (movingupstream from the bottleneck) to catch up with the jam densityshockwave?

Answer & Explanation Solved by verified expert

4.4 Ratings (934 Votes)

a Arrival rate 3300 vphso in 20 minutes of vehicles which arrived 33002060 1100vehiclesQueue length after 20 minutes can be calculated by calculatingthe shockwave speed and then doing some calculationsa q1 3300 vehhr k1 35vpmkjam 160 vehmilaneSpeed of the backward shockwave ie at which queue is formingand See Answer

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