Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
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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- 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. Phase Allowed movements 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, 3300 veh/h 650, 600 veh/h 1750, 1800 veh/h Calculate the sum of the flow ratios for the critical lane groups. O 0.709 O 0.857 O 0.787 O 0.829arrow_forwardAn 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 3arrow_forwardDetermine whether a T intersection (one leg on the minor approach) with the hourly volume data satisfy MUTCD Warrant 3 (peak-hr vehicular volume) for signalization. All approaches have one lane entering the intersection. For the warrant that is met, explain how the warrant is met (rules applied, hours in which the volume criteria were met, etc.) and refer to necessary graphs and tables. The major street speed limit is 60 km/h, and the minor street speed limit is 40 km/h.arrow_forward
- A traffic signal control is being designed for a four-leg intersection on a divided highway with the characteristics shown in the table below. Assuming the average vehicle length L is 6m, Determine an appropriate length of the yellow interval for each approach and how you will provide it. Use the AASHTO recommended deceleration rate and perception-reaction time. N-S Approaches E-W Approaches Median width, (m) 6. 3 No. of 3.5 lanes 3 on each approach Design speed, km/h 60 Grade -3.5 2. 80arrow_forwardAn 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. Phase 3 Allowed movements NB L, SB L NB T/R, SB T/R EB L, WB L ЕВ TR, WB TR Analy sis flow rate 330, 365 veh/h 1125, 1075 veh/h 110, 80 veb/h 250, 285 veh/h Saturation flow rate 1700, 1750 veh/h 3400, 3300 veh/h 650, 600 veh/h 1750, 1800 veh/h Calculate the sum of the flow ratios for the critical lane groups. 0.787 O 0.857 O 0.709 O 0,829arrow_forwardAn 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. Phase 3 Allowed movements NB L, SB L NB T/R, SB T/R EB L, WB L EB TR, WB TR 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, 3300 vehh 650, 600 veh/h 1750, 1 800 veh/h Using v/c equalization ratio, calculate the effective green time for phase 3 14.825 sec 15.552 sec O 11.462 sec O 16.065 secarrow_forward
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