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Assuming a linear speed-density relationship. the mean free speed is observed to be 65 mph at...

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Civil Engineering

Assuming a linear speed-density relationship. the mean freespeed is observed to be 65 mph at near zero density and thecorresponding jam density is 160 veh/mi. Assume that the averagelength of vehicles is 20 feet.

a) Write down the equations for speed-density and flow-densityrelationships

b) Calculate the speed and density corresponding to a flow of1000 veh/hr

c) Calculate the average time headway and average space headwaywhen the traffic flow is at maximum value

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