List 10 key factors of congestion mitigation that may influence freeway mobility performance.

A 5% upgrade on a six-lane freeway (three lanes in each direction) is 1.25 mi long. On this segment of freeway, there is 3% SUTS and 7% TTs, and the peak-hour factor is 0.90. The lanes are 12 ft wide, there are no lateral obstructions within 6 ft of the roadway, and the total ramp density is 1.0 ramps per mile. What is the maximum directional peak-hour volume that can be accommodated without exceeding LOS C operating conditions in veh/h? Round of your answer to whole number. Blank 1

Consider the problem of traffic flow on a three-lane (one direction) freeway which can be described by the Greenshields model. One lane of the three lanes on a section of this freeway will have to be closed to undertake an emergency bridge repair that is expected to take several hours. It is estimated that the capacity at the work zone will be reduced by 30 percent of that of the section just upstream of the work zone. The mean free flow speed of the highway is 60 mi/h and the jam density is 130 veh/mi/ln. It is estimated that the demand flow on the highway during the emergency repairs is 86 percent of the capacity. Using the deterministic approach, determine the following for the expected repair periods of 1 h, 1.5 h, 2.5 h, 2.75 h, and 3 h. (a) the maximum queue length (in veh) that will be formed 1 h     veh1.5 h     veh2.5 h     veh2.75 h     veh3 h     veh (b) the total delay (in h) 1 h     h1.5 h     h2.5 h     h2.75 h     h3 h     h (c) the number of vehicles that will…

Problem 2. New freeway is being designed on a level terrain, free-flow speed 70 mph 12-ft lanes, 6-ft lateral clearance Peak hour volume 2700 veh, 12% heavy vehicles PHF = 0.92 FIND: Number of lanes for LOS C

B2

What are the main considerations when a new interchange is proposed? List the main considerations and briefly discuss each one.