3. Check whether the following 4-way intersection with the two minor streets controlled by "STOP" sign needs to be signalized using warrants: Annual crashes: 5 right angle with injuries 6 left-turn with major injuries ● • 3 rear end (PDO) ● 4 pedestrian crashes with 2 major injuries) Traffic data Time 5-6 am 6-7 am 7-8 am 8-9 am 9-10 am 10-11 am 11-12 n 12-1 pm 1-2 pm 2-3 pm 3-4 pm 4-5 pm 5-6 pm 6-7pm 7-8 pm 8-9 pm Main Street Volume (veh/hr) EB 450 555 625 575 490 550 565 590 480 565 575 600 675 550 450 400 WB 440 525 575 560 460 490 540 545 420 490 515 550 595 490 390 350 Minor Street Volume (veh/hr) NB 50 60 100 120 90 80 90 95 100 85 100 110 135 105 80 55 SB 60 75 115 125 100 95 98 100 110 95 115 130 150 110 80 60 Pedestrian Volume (Ped/Hr), Crossing the Main 20 85 135 145 120 110 105 125 135 95 85 110 155 140 100 60

3. Check whether the following 4-way intersection with the two minor streets controlled by "STOP" sign needs to be signalized using warrants: Annual crashes: 5 right angle with injuries 6 left-turn with major injuries ● • 3 rear end (PDO) ● 4 pedestrian crashes with 2 major injuries) Traffic data Time 5-6 am 6-7 am 7-8 am 8-9 am 9-10 am 10-11 am 11-12 n 12-1 pm 1-2 pm 2-3 pm 3-4 pm 4-5 pm 5-6 pm 6-7pm 7-8 pm 8-9 pm Main Street Volume (veh/hr) EB 450 555 625 575 490 550 565 590 480 565 575 600 675 550 450 400 WB 440 525 575 560 460 490 540 545 420 490 515 550 595 490 390 350 Minor Street Volume (veh/hr) NB 50 60 100 120 90 80 90 95 100 85 100 110 135 105 80 55 SB 60 75 115 125 100 95 98 100 110 95 115 130 150 110 80 60 Pedestrian Volume (Ped/Hr), Crossing the Main 20 85 135 145 120 110 105 125 135 95 85 110 155 140 100 60

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter8: Intersection Control

Section: Chapter Questions

Problem 24P

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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
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 0.829
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 2 3 Allowed movements NB L, SB L NB T/R, SB T/R EB L, WBL 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 minimum cycle length O 255 sec O 155 sec O 100 sec O 60 sec
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 3 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 Using v/c equalization ratio, calculate the effective green time for phase 1 O 15.954 sec O 12.105 sec O 14.127 sec O 13.190 sec
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 1 2 3 Allowed movements NB L, SB L NB T/R, SB T/R EB L, WB L EB T/R, 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 veh/h 650, 600 veh/h 1750, 1800 vehh Calculate minimum cycle length O 255 sec O 60 sec O 155 sec O 100 sec
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A signalized intersection has two lane groups. The two WBT lanes (lane group #1) have a total volume of 863 pc/h and an average control delay of 24.5 seconds. The one WBL lane (lane group #2) has a volume of 203 pc/h and an average control delay of 36.5 seconds. What is the approach's LOS? Group of answer choices LOS A LOS D LOS C LOS B
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An signalized intersection located in Baghdad Capital with four phases, if EYi=0.77, lost time for each phase (Lt = 3.0 sec. ).The cycle length for this signalized intersection is equal: * 100 sec. 110 sec. O 107 min. O 41 sec. O 105 sec.
A signalized intersection has four approaches. If the north, south, east, and west approaches have average control delays of 21, 25, 34, and 32 seconds, respectively, and their respective volumes are 198, 176, 265, and 303 pc/h, what is the intersection LOS? Group of answer choices LOS C LOS B LOS A LOS D
Determine 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.
Please calculate the level of service and delay for the westbound left lane group, the westbound approach, and the whole intersection. I provided LOS chart for reference.