Consider the geometric and traffic characteristics shown below Approach (Width) North South East Wes

Consider the geometric and traffic characteristics shown below Approach (Width) North South East West (56 ft) (56 ft) (68 ft) (68 ft) Peak hour Approach Volumes: Left Turn 173 113 208 174 Through Movement 460 413 603 556 Right Turn 160 155 189 198 Conflicting Pedestrian Volumes 900 900 1,200 1.200 0.95 PHF 0.95 0.95 0.95 Assume the following saturation flows. Through lanes 1,600 veh/h/In Through-right lanes 1.400 veh/h/In Left lanes 1,000 veh/h/In Left-through lanes: 1,200 veh/h/In Left-through-right lanes: 1,100 veh/h/In Determine a suitable signal phasing system and phase lengths (in s) for the intersection using the Webster method. (Enter the sum of green and yellow times for each phase, and afterwards the total cycle length, Ensure that enough green time is provided to alow for pedestrian movement. Assume each of the four approaches is divided into a left lane, a through lane, and a through-right lane, Assume the lost time due to acceleration and deceleration during each phase is 3.5 seconds, and the time lost due to the red clearance interval between each phase is 1.5 seconds. Also, assume the curb-to-curb distance is 56 ft when pedestrians travel during the N-S phases and 60 ft when pedestrians travel during the E-W phases. Finally, assume pedestrians walk at a speed of 3.5 t/s through a crosswalk of width 10 ft.) Phase 1: N-S left turn Phase 2: N-S through & through-right turn Phase 3: E-W left turn Phase 4: E-W through & through-right turn Total cycle length Show a detailed layout of the phasing system and the intersection geometry used, (Submit a file with a maximum size of 1 MB.) Consider the geometric and traffic characteristics shown below. South West (68 ft) Approach (Width) Peak hour Approach Volumes: North East (56 ft) (68 ft) Left Turn 173 113 200 174 Through Movement 460 413 603 556 Right Turn 160 155 189 198 Conflicting Pedestrian Volumes 900 1.200 1,200 900 PHF 0.95 0.9s 0.95 0.95 Assume the following saturation flows Through lanes Through-right lanes: 1,600 veh/h/In 1,400 veh/h/In Left lanes: 1,000 veh/h/In Left-through lanes: 1,200 veh/h/in Left-through-right lanes: 1,100 veh/h/in Determine a suitable signal phasing system and phase lengths (in s) for the intersection using the Webster method. (Enter the sum of green and vellow times for each phase, and afterwards the total cycle length, Ensure that enough green time is provided to allow for pedestrian movement, Assume each of the four approaches is divided into a left lane, a through lane, and a through-right lane. Assume the lost time due to acceleration and deceleration during each phase is 3.5 seconds, and the time lost due to the red clearance interval between each phase is 1.5 seconds. Also, assume the curb-to-curb distance is 56 ft when pedestrians travel during the N-S phases and 68 ft when pedestrians travel during the E-W phases. Finally, assume pedestrians walk at a speed of 3.5 ft/s through a crosswalk of width 10 ft.) T41 AM

0 replies