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A turning movement count and a saturation flow study were conducted at a major intersection on an expressway with configuration as presented in Fig.1. The peak-hour volumes and saturation flows obtained from the studies for each movement are presented in Tables 1 and 2, respectively.  i) Using the Webster method, determine a suitable preset signal timing for the intersection using a phasing plan that will yield the minimum cycle length out of all possible phasing plans. ii ) Also provide a diagrammatic representation of the signal sequence at the intersection. Assume a yellow interval of 3s, all-red interval of 2s and a peak hour factor of 0.95 for all the approaches. Note: No two movements should conflict during the determination of the phasing plan.

A turning movement count and a saturation flow study were conducted at a major intersection on an expressway with configuration as presented in Fig.1. The peak-hour volumes and saturation flows obtained from the studies for each movement are presented in Tables 1 and 2, respectively.  i) Using the Webster method, determine a suitable preset signal timing for the intersection using a phasing plan that will yield the minimum cycle length out of all possible phasing plans. ii ) Also provide a diagrammatic representation of the signal sequence at the intersection. Assume a yellow interval of 3s, all-red interval of 2s and a peak hour factor of 0.95 for all the approaches. Note: No two movements should conflict during the determination of the phasing plan.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A turning movement count and a saturation flow study were conducted at a major intersection on an expressway with configuration as presented in Fig.1. The peak-hour volumes and saturation flows obtained from the studies for each movement are presented in Tables 1 and 2, respectively. 

i) Using the Webster method, determine a suitable preset signal timing for the intersection using a phasing plan that will yield the minimum cycle length out of all possible phasing plans.

ii ) Also provide a diagrammatic representation of the signal sequence at the intersection. Assume a yellow interval of 3s, all-red interval of 2s and a peak hour factor of 0.95 for all the approaches. Note: No two movements should conflict during the determination of the phasing plan.

please anwser ( ii )

please show your diagram in ( ii ) , very important.

Table 1: Peak-Hour Volumes Vehicle class Private cars Taxies Pickups/4WDs Light bus (trotro) Large bus Trucks/Trailers Total A t 75 88 149 25 43 48 13 Table 3: PCU Factors Vehicle class 1 Private car 1 Taxi 1 Pickup/4WD 1 Light bus (trotro) 1 Large bus 1 Truck/Trailer B C D 128 128 PCU factor 1.0 1.0 1.0 1.3 DOMNS 23 Peak-hour volumes (veh/hr) by movement type H I J 2.25 3.5 90 149 105 43 81 81 21 21 Table 2: Saturation Flow Movemen A B C D E F 30 E Saturation 160 185 185 160 185 185 flow 0 0 0 0 0 (pcu/hr) 35 40 12 35 40 57 22 42 25 63 63 15 6 11 7 17 17 1 2 1 3 3 3 4 4 3 250 425 425 300 220 130 331 331 115 F G 66 77 22 35 46 13 39 99 99 46 116 116 33 G H 160 0 33 185 0 8 10 3 51 K 227 25 44 14 0 1 28 72 L L J K L 185 160 185 185 0 0 0 0 30 35 10 19 95 сло 1 100
Transcribed Image Text:Table 1: Peak-Hour Volumes Vehicle class Private cars Taxies Pickups/4WDs Light bus (trotro) Large bus Trucks/Trailers Total A t 75 88 149 25 43 48 13 Table 3: PCU Factors Vehicle class 1 Private car 1 Taxi 1 Pickup/4WD 1 Light bus (trotro) 1 Large bus 1 Truck/Trailer B C D 128 128 PCU factor 1.0 1.0 1.0 1.3 DOMNS 23 Peak-hour volumes (veh/hr) by movement type H I J 2.25 3.5 90 149 105 43 81 81 21 21 Table 2: Saturation Flow Movemen A B C D E F 30 E Saturation 160 185 185 160 185 185 flow 0 0 0 0 0 (pcu/hr) 35 40 12 35 40 57 22 42 25 63 63 15 6 11 7 17 17 1 2 1 3 3 3 4 4 3 250 425 425 300 220 130 331 331 115 F G 66 77 22 35 46 13 39 99 99 46 116 116 33 G H 160 0 33 185 0 8 10 3 51 K 227 25 44 14 0 1 28 72 L L J K L 185 160 185 185 0 0 0 0 30 35 10 19 95 сло 1 100
B EI F Fig.1: Traffic Movements at a Major Intersection N
Transcribed Image Text:B EI F Fig.1: Traffic Movements at a Major Intersection N
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