ASSIGNM-03-3610-1

ASSIGNM-03-3610-1 - factor of 0.80, a rolling terrain,...

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CIVL 3610 - Traffic and Transportation Engineering ASSIGNMENT 3 Highway Capacity and Level of Service QUESTION 1 The following 12 consecutive 5-min vehicle counts were taken on a highway: 60 40 55 65 85 90 100 110 140 95 65 40 (a) Plot the histogram of these counts and the histogram of the flow rates computed on the basis of the counts above. (b) Calculate the hourly volume and the PHF. QUESTION 2 A suburban highway is being designed. The highway is expected to serve a peak-hour volume of 3000 veh/hr in one direction. Trucks and buses are estimated to constitute 15% and 10% of the traffic, respectively, and no recreational vehicles are anticipated. It is desired to provide for level-of-service D on this highway. Given a peak hour
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Unformatted text preview: factor of 0.80, a rolling terrain, 10-ft lanes, a 60 mph design speed, and adequate lateral clearances, determine the minimum number of lanes needed to provide for this. QUESTION 3 A six-lane urban freeway (three lanes in each direction) is on rolling terrain with a 70-mph design speed, 10-ft lanes, with obstructions 2 ft from pavement edge at median and roadside. A directional peak-hour volume of 1800 vehicles is observed with 550 vehicles arriving in the most congested 15-min period. If the traffic stream has 10 percent trucks, 8 percent buses and no recreational vehicles, determine (a) the level of service (b) how many additional vehicles can be added to the peak hour before the freeway reaches capacity....
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