PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Question
Chapter 7, Problem 60P
To determine
The sum of the flow ratios for the critical lane group.
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The following calculations are taken at the approach of an intersection during the morning rush hour. Determine
(a) the hourly volume,
(b) the peak flow rate in one hour, and
(c) the peak hour factor.
An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below.
(1) Calculate the sum of the flow ratios for the critical lane groups.
(2) calculate the minimum cycle length and the effective green time for each phase (balancing v/c for the critical lane groups). Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired.
3. An intersection approach has two lane groups: left-turn lane group, and through/right-turn lane
group. The control delay is 37 seconds/vehicle for the left-turn lane group, and 27
seconds/vehicle for the through/right-turn lane group. The analysis flow rate is 97
vehicles/hour for the left-turn lane group, and 450 vehicles/hour for the through/right-turn lane
group. Calculate the approach control delay and write the corresponding level of service (LOS)
for the approach in the box below.
Chapter 7 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
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