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 8P
To determine
The passage cars could be added to original traffic.
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It is estimated that after 25 years in a section of highway, the average daily traffic will be 15000 vehicles. It is found that ratio of design hourly volume to the average daily traffic was 15%. The one way traffic volume in the predominant direction is 60% of the two way design hourly volume. Determine the directional ?design hourly volume after 25 years **
The traffic demand for a six-lane urban arterial road (three lanes per direction) is given in the table
below. The relationship between flow and density for this road follows GreenShiled's model, with
a free flow speed of 105 km/h and a jam density of 92 veh/km/lane. Two of the three lanes of the
EB direction were closed at 5:00 AM for maintenance. The two lanes were re-opened at 8:00 AM,
allowing the traffic to be released at capacity conditions.
a) What is the maximum length of the queue upstream of the bottleneck?
b) At what time the queue upstream of the bottleneck will be fully dissipated?
c) What is the furthest point upstream of the bottleneck that will be impacted by the lane
closure?
d) Draw the shock wave diagram showing shock wave speeds, critical times, and distances.
Time
5:00
6:00 AM
6:00 7:00 AM
7:00 8:00 AM
8:00 9:00 AM
9:00 10:00 AM
10:00 11:00 AM
Demand (vph)
2000
4000
6400
6000
3600
3000
with central reserve the current traffic in 2019 expressed by AADT is 3000
vehicle in both direction. the improved road with design life traffic 20 years
will be opened to traffic in 2024. The estimated annual growth rate of traffic
is 5%.
1000pcu/hr
12% f ADT
60% of total volume
16% of hourly volume
Lane capacity
K
D
Th
Q1-B:1-How are travel time and delay studies used?
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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