Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 8, Problem 14P
To determine
For a signal phase determine the yellow interval by the given conditions.
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Q4b. What are the relevance of the following considerations in traffic signal timing design?
i. Incorporating all-red interval in the inter-green period
ii. Conversion of all vehicle categories to passenger car units (PCU)
plz, solve this problem, it is not graded question.
Transportation Engineering-1
During a 70 sec period, a detector is occupied by vehicles for the following times: 0.31, 0.39, 0.41, 0.35, and 0.53 sec. Estimate the values of flow (q), density (k) and speed (v). Assume that the loop detector is 10 ft and that that the average length of the vehicle is 20 ft.
An intersection has a three-phase signal with the movement allowed in each phase and corresponding analysis and saturation flow rates shown in the table below. Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired
Phase
1
2
3
Allowed Movement
NB L, SB L
NB T/R, SB T/R
EB L, WB L
EB /T/R, WB T/R
Analysis Flow Rate
330, 365 veh/h
1125, 1075 veh/h
110, 80 veh/h
250, 285 veh/h
Saturation Flow Rate
1700, 1750 veh/h
3400, 300 veh/h
650, 600 veh/h
1750, 1800 veh/h
Calculate the Following:
1.)Sum of flow ratios for critical lane groups
2.)minimum cycle length
3.)using v/c equation ratio, calculate the effective green time for phase 1
4.)using v/c equation ratio, calculate the effective green time for phase 2
5.)using v/c equation ratio, calculate the effective green time for phase 3
Chapter 8 Solutions
Traffic and Highway Engineering
Ch. 8 - Prob. 1PCh. 8 - Prob. 2PCh. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 5PCh. 8 - Prob. 6PCh. 8 - Prob. 7PCh. 8 - Prob. 8PCh. 8 - Prob. 9PCh. 8 - Prob. 10P
Ch. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 16PCh. 8 - Prob. 17PCh. 8 - Prob. 18PCh. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28P
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