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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Question
Chapter 6, Problem 12P
To determine
The density and level of service of highway segment.
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An existing urban freeway with 4 lanes in each direction has the following characteristics.
Traffic data:
Peak hour volume (in the peak direction):
Trucks:
PHF = 0.93
Geometric data:
LOS A
OLOS B
LOS C
LOS D
LOS E
LOS F
Lane width:
Shoulder width:
Total ramp density:
Terrain: rolling
11 ft
6 ft
1.8 ramps per mile
Determine the LOS in the peak hour. (Assume commuter traffic and assume no RVs.)
7,090 veh/h
10% of peak hour volume
Show the demand flow rate (in pc/h/In), mean speed (in mi/h), and density (in pc/mi/In) for the given conditions.
demand flow rate
2191
pc/h/In
mean speed
density
50 X mi/h
43.82 X pc/mi/In
An existing urban freeway with 4 lanes in each direction has the following characteristics.
Traffic data:
Peak hour volume (in the peak direction):
Trucks:
PHF = 0.93
Geometric data:
LOS A
LOS B
LOS C
LOS D
LOS E
LOS F
Lane width:
Shoulder width:
Total ramp density:
Terrain: rolling
11 ft
6 ft
1.8 ramps per mile
Determine the LOS in the peak hour. (Assume commuter traffic and assume no RVs.)
mean speed
density
7,010 veh/h
10% of peak hour volume
Show the demand flow rate (in pc/h/In), mean speed (in mi/h), and density (in pc/mi/In) for the given conditions.
demand flow rate
2199
pc/h/In
54 X mi/h
41 X
pc/mi/In
A freeway is to be designed to provide LOS C for the
following conditions: design hourly volume of 5600 veh/h;
PHF: 0.92; trucks: 6%; free flow speed: 70 mi/h; no lateral
obstructions;rolling terrain; total ramp density of 0.75 ramps
per mile.Determine: whether eight (four in each direction)
12 ft lanesare enough to provide LOS C.
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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