Example 2 A freeway is being designed for a location in mountainous terrain. The expected free- flow speed is 55 mi/h. Lane widths will be 12 ft and shoulder widths will be 6 ft. During the peak hour, it is expected that there will be a directional peak-hour volume of 2700 vehicles, of which there are 12% buses and 6% recreational vehicles. The PHF and driver population adjustment are expected to be 0.88 and 0.90, respectively. If a level of service no worse than D is desired, determine the necessary number of lanes.
Example 2 A freeway is being designed for a location in mountainous terrain. The expected free- flow speed is 55 mi/h. Lane widths will be 12 ft and shoulder widths will be 6 ft. During the peak hour, it is expected that there will be a directional peak-hour volume of 2700 vehicles, of which there are 12% buses and 6% recreational vehicles. The PHF and driver population adjustment are expected to be 0.88 and 0.90, respectively. If a level of service no worse than D is desired, determine the necessary number of lanes.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Example 2
A freeway is being designed for a location in mountainous terrain. The expected free-
flow speed is 55 mi/h. Lane widths will be 12 ft and shoulder widths will be 6 ft. During
the peak hour, it is expected that there will be a directional peak-hour volume of 2700
vehicles, of which there are 12% buses and 6% recreational vehicles. The PHF and
driver population adjustment are expected to be 0.88 and 0.90, respectively. If a level of
service no worse than D is desired, determine the necessary number of lanes.
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