Assume that the speed-density function of a section of highway follows Greenshield's Model. The free-flow speed is 75 mph and the jam density is 176 veh mi lane a. Derive V as a function of S. b. In 15 minutes, you have counted that V=150 veh 15 minute lane Estimate the two possible speeds S (in mph) during this 15 minute period.

Highway Engineering: Theory of Traffic Flow

1.) From  the  traffic  studies  performed  along a street shows  the  distances  each vehicle traveled every 3 seconds on a portion of the highway. Vehicle            Distance, m  1                        82.6  2                        89.9  3                        84.6  4                        82 a.compute the space mean speed of the traffic, in kph.b.compute the flow of traffic.c.compute the density of traffic.

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. An automobile traveling at a rate of 30 ft/sec is approaching an intersection. When the automobile is 120 ft from the intersection, a truck traveling at the rate of 40 fi/sec crosses the intersection, The automobile and the truck are on roads that are at right angles to each other. How fast are the automobile and the truck separating 2 sec after the truck leaves the intersection?

Assume that the speed-density function of a section of a highway follows the Greenshields model. The free-flow speed is 75 mph and the jam density is 176 veh/mi/In. Derive V as a function of S. In 15 minutes, you have counted that V = 150 veh/15-minute/In. Estimate the two possible speeds S (in mph) during this 15-minute period.

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The space mean speed (kmph) and density (vehicles/km) of a traffic stream are linearly related. The free flow speed and jam density are 80 kmph and 100 vehicles/km respectively. The traffic flow (in vehicles/h, up to one decimal place) corresponding to a speed of 40 kmph is SIIRDED

SHOW A FULL SOLUTIONAfter mall opening, the traffic volume (demand) in a certain road section (6-lane divided highway) at the peak hour is forecasted to be 5200vph. An accident blocks 1 lane of the highway. It took 15 minutes till the accident is cleared and capacity is fully restored. Use the following speeddensity relationship: u=112.81-1.75k (u is speed in kph and k is density in vpk/lane) to answer the following questions:a.) Determine the free-flowing speedb.) Compute for the shockwave between the free-flow state and the state where there is capacity reduction due to accident.c.) Compute for the shockwave between state when there is capacity reduction due to accident and the state where vehicles flow with full section capacity