Design change periods (Clearance period, Yellow, and All-Red) for the through movements for the intersection geometry attached. Assume a vehicle length of 20 ft, 35 mph speed limit on X St., and 40 mph speed limit on Y street. Assume t, = 1 second, a = 10 ft/s2 For the same intersection, determine the minimum vehicle green for the through Problem 1: Problem 2: movements, assuming pedestrian speed of 3.6 ft/s and Gmp= 7 s. Problem 3: turn volume is moderate on the NB, SB, and EB approaches and is weak on the WB approach. Pedestrian traffic does not warrant a pedestrian phase here. Problem 4: Give a reasonable sequence of phases for this intersection, considering that left Compute delays and determine LOS for the NBTH and NBLT lane groups at this intersection. Assume a full-actuated control with unit extension (passage time, PT) of 4 seconds and absence of filtering/metering at the neighboring signalized intersections. Effective green signal times are. 8 NB.TH = 33.2s 8 NB,LT =17.3s and Cycle length is: C = 125 s 3.99m 4,02m 7.99m 3.81m 3.82m X Street 1.38m 5.7 Sm 3.0m - 5.29m 1.55m 3.21m 3.26m 3.47m 4.51m- 3.09m 6.70m 3.44m 3.90m 87m 09m 4.06m Y Street 4.51mH

Design change periods (Clearance period, Yellow, and All-Red) for the through movements for the intersection geometry attached. Assume a vehicle length of 20 ft, 35 mph speed limit on X St., and 40 mph speed limit on Y street. Assume t, = 1 second, a = 10 ft/s2 For the same intersection, determine the minimum vehicle green for the through Problem 1: Problem 2: movements, assuming pedestrian speed of 3.6 ft/s and Gmp= 7 s. Problem 3: turn volume is moderate on the NB, SB, and EB approaches and is weak on the WB approach. Pedestrian traffic does not warrant a pedestrian phase here. Problem 4: Give a reasonable sequence of phases for this intersection, considering that left Compute delays and determine LOS for the NBTH and NBLT lane groups at this intersection. Assume a full-actuated control with unit extension (passage time, PT) of 4 seconds and absence of filtering/metering at the neighboring signalized intersections. Effective green signal times are. 8 NB.TH = 33.2s 8 NB,LT =17.3s and Cycle length is: C = 125 s 3.99m 4,02m 7.99m 3.81m 3.82m X Street 1.38m 5.7 Sm 3.0m - 5.29m 1.55m 3.21m 3.26m 3.47m 4.51m- 3.09m 6.70m 3.44m 3.90m 87m 09m 4.06m Y Street 4.51mH

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter8: Intersection Control

Section: Chapter Questions

Problem 22P

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