Version A. A freeway section has 4 lanes on each direction. Lane width = 11 ft. Right-side shoulder width = 4 ft. A total of 5 ramp exits/entrances are found over the 3-mile section. Annual average daily traffic (AADT) is estimated at 60,000 veh/day. Evaluate the LOS using the 30th largest design hour volume. Other parameters are listed below: This freeway serves primarily commuter traffic. Trucks & buses account for 10% of total traffic; RVs account for 0% of total traffic. PHF = 0.85 Directional factor = 0.65 Rolling terrain

Version A. A freeway section has 4 lanes on each direction. Lane width = 11 ft. Right-side shoulder width = 4 ft. A total of 5 ramp exits/entrances are found over the 3-mile section. Annual average daily traffic (AADT) is estimated at 60,000 veh/day. Evaluate the LOS using the 30th largest design hour volume. Other parameters are listed below: This freeway serves primarily commuter traffic. Trucks & buses account for 10% of total traffic; RVs account for 0% of total traffic. PHF = 0.85 Directional factor = 0.65 Rolling terrain

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 8P

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Determine the L.O.S of the road if PHF = 0.88, D= 60%, K=O.11, V=115 kph? For an Existing 4 lane freeway having the following features: • Lane and shoulder width = 12 ft, 6 ft, weekday commuter • Percent of trucks and buses = 8% and 4% respectively and Et =2.5, Eb =2.2• AADT = 35200 veh/day, Assume lane capacity * 2000 pc/hr
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A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 3.5m wide, the right-side shoulder is 1.2 m wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. a) Determine the hourly volume for these conditions. b) At one point along this freeway, there is a 4% upgrade with a directional hourly traffic volume of 5000 vehicles. How long can this grade be without the freeway LOS dropping to F?
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A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. b.) Determine the adjustment factor (f). (Express in three decimals)
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