a A: For the geometric and traffic characteristics shown below, determine a suitable signal phasing system and phase len

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A A For The Geometric And Traffic Characteristics Shown Below Determine A Suitable Signal Phasing System And Phase Len 1 (60.68 KiB) Viewed 23 times

a A: For the geometric and traffic characteristics shown below, determine a suitable signal phasing system and phase lengths for the intersection using Webster method. Show a detailed layout of the phasing system and the intersection geometry used. Assume lost time phase due to acceleration and deceleration at phase changes in 3.0 seconds and that an all-red interval of 1.5 seconds is provided at each phase: North Approach (18m) South Approach (18m) East Approach (20m) Approach Width West Approach (20m) Peak-hour approach volume 130 83 148 134 Left turn 430 393 575 506 Through movement Right Turn 160 139 169 188 0.90 0.90 0.90 PHF 0.90 800 ped/hr 700 ped/hr Conflicting pedestrian volume 900 ped/hr 1000 ped/hr Effective crosswalk width = 4 m Use the following saturation flows: Through lanes: 1750 veh/h/In Right lanes: 1300 veh/h/In doo Left lanes: 1250 veh/h/In Left and through lanes: 1300 veh/in/h Right and through lanes: 1650 veh/in/h Left, though, and right lanes: 1200 veh/In/h