Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Chapter 8, Problem 14P
To determine
For a signal phase determine the yellow interval by the given conditions.
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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. Assume the lost time is 4 seconds per phase and a critical
intersection v/c of 0.90 is desired.
O 15.552 sec
O 11.462 sec
O 14.825 sec
Phase
O 16.065 sec
Allowed movements
Analysis flow rate
Saturation flow rate
Using v/c equalization ratio, calculate the effective green time for phase 3
1
NB L, SB L
330, 365 veh/h
1700, 1750 veh/h
2
NB T/R, SB T/R
1125, 1075 veh/h
3400, 3300 veh/h
EB L, WB L
110, 80 veh/h
650, 600 veh/h
3
EB T/R, WB T/R
250, 285 veh/h
1750, 1800 veh/h
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. Assume the lost time is 4 seconds per phase and a critical
intersection v/c of 0.90 is desired.
O 12.105 sec
O 15.954 sec
O 13.190 sec
Phase
O 14.127 sec
Allowed movements
Analysis flow rate
Saturation flow rate
1
NB L, SB L
330, 365 veh/h
1700, 1750 veh/h
Using v/c equalization ratio, calculate the effective green time for phase 1
2
NB T/R, SB T/R
1125, 1075 veh/h
3400, 3300 veh/h
EBL, WBL
110, 80 veh/h
650, 600 veh/h
3
EB T/R, WB T/R
250, 285 veh/h
1750, 1800 veh/h
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. Assume the lost time is 4 seconds per phase and a critical
intersection v/c of 0.90 is desired.
O 20.464 sec
O 22.411 sec
O 24.460 sec
Phase
O 21.035 sec
Allowed movements
Analysis flow rate
Saturation flow rate
Using v/c equalization ratio, calculate the effective green time for phase 2
NB L, SB L
330, 365 veh/h
1700, 1750 veh/h
2
NB T/R, SB T/R
1125, 1075 veh/h
3400, 3300 veh/h
EB L, WBL
110, 80 veh/h
650, 600 veh/h
3
EB T/R, WB T/R
250, 285 veh/h
1750, 1800 veh/h
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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