Principles of Highway Engineering and Traffic Analysi (NEW!!)
6th Edition
ISBN: 9781119305026
Author: Fred L. Mannering, Scott S. Washburn
Publisher: WILEY
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Chapter 6, Problem 38P
To determine
The traffic density of freeway.
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A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLW = 6.0 mph) 4 ft from the right edge of the traveled pavement (fLC = 0.8 mph). There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6% recreational vehicles (ER = 2.0).
What is the estimated free-flow speed of the traffic stream in mph (whole number, nearest 5)? Blank 1
What is the peak-hour factor (3 decimal places)? Blank 2
What is the heavy-vehicle adjustment factor (2 decimal places)? Blank 3
What is the service flow rate (whole number, nearest 5)? Blank 4
What is the service measure value if the average speed of the traffic stream is 65 mph (one decimal place)? Blank 5
A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLW = 6.0 mph) 4 ft from the right edge of the traveled pavement (fLC = 0.8 mph). There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6% recreational vehicles (ER = 2.0).
What is the estimated free-flow speed of the traffic stream in mph (whole number, nearest 5)?
What is the peak-hour factor (3 decimal places)?
What is the heavy-vehicle adjustment factor (2 decimal places)?
What is the service flow rate (whole number, nearest 5)?
What is the service measure value if the average speed of the traffic stream is 65 mph (one decimal place)?
A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLw = 6.0
mph) 4 ft from the right edge of the traveled pavement (fic = 0.8 mph). There are five ramps within three miles
upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A
directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in
the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6%
recreational vehicles (ER = 2.0).
1.) What is the estimated free-flow speed of the traffic stream in mph (whole number, nearest 5)?
2.) What is the peak-hour factor
3.) What is the heavy-vehicle adjustment factor?
4.) What is the service flow rate?
5.) What is the service measure value if the average speed of the traffic stream is 65 mph
Chapter 6 Solutions
Principles of Highway Engineering and Traffic Analysi (NEW!!)
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - Prob. 26PCh. 6 - Prob. 27PCh. 6 - Prob. 28PCh. 6 - Prob. 29PCh. 6 - Prob. 30PCh. 6 - Prob. 31PCh. 6 - Prob. 32PCh. 6 - Prob. 33PCh. 6 - Prob. 34PCh. 6 - Prob. 35PCh. 6 - Prob. 36PCh. 6 - Prob. 37PCh. 6 - Prob. 38PCh. 6 - Prob. 39PCh. 6 - Prob. 40PCh. 6 - Prob. 41PCh. 6 - Prob. 42PCh. 6 - Prob. 43P
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