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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
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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Problem 1: 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/s? Problem 2: %3D For the same intersection, determine the minimum vehicle green for the through 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. 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. Problem 4: =D33.2s %3D 8 NB,TH = 33.2s 8 NB,LT =17.3s and Cycle length is: C = 125 s %3D 3.41m 3.99m 4.02m 7.99m- 3.81m 3.82m X Street 1.38m 3.03m 5.73m - 5.29m 3.48m 1.55m 3.26m 3.21m 3,47m 4.51m 6.70m 3.19m 1.20m 3,44m 3.90m 3.87m 4,09m 4.06m Y Street 4.51m-
Transcribed Image Text:Problem 1: 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/s? Problem 2: %3D For the same intersection, determine the minimum vehicle green for the through 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. 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. Problem 4: =D33.2s %3D 8 NB,TH = 33.2s 8 NB,LT =17.3s and Cycle length is: C = 125 s %3D 3.41m 3.99m 4.02m 7.99m- 3.81m 3.82m X Street 1.38m 3.03m 5.73m - 5.29m 3.48m 1.55m 3.26m 3.21m 3,47m 4.51m 6.70m 3.19m 1.20m 3,44m 3.90m 3.87m 4,09m 4.06m Y Street 4.51m-
4 1 S S S 5 6 7 8. Table 1. Movement Counts at the Intersection (veh/15 min) Northbound Southbound Eastbound Westbound Interval L R T R 1630 to 1645 53 207 16 26 221 35 65 159 49 16 86 24 55 230 19 66 190 43 67 159 45 21 84 43 1645 to 1700 1700 to 1715 52 241 14 29 190 44 83 188 52 28 98 46 1715 to 1730 49 238 19 43 214 37 57 171 55 23 81 35 Total 209 916 68 164 815 159 272 677 201 88 349 148 Table 2. Saturation Flow Rates (veh/h) Movement Sat. Flow Per Lane Through Through & Right 1900 1850 Left 1700 Right 1500 2.
Transcribed Image Text:4 1 S S S 5 6 7 8. Table 1. Movement Counts at the Intersection (veh/15 min) Northbound Southbound Eastbound Westbound Interval L R T R 1630 to 1645 53 207 16 26 221 35 65 159 49 16 86 24 55 230 19 66 190 43 67 159 45 21 84 43 1645 to 1700 1700 to 1715 52 241 14 29 190 44 83 188 52 28 98 46 1715 to 1730 49 238 19 43 214 37 57 171 55 23 81 35 Total 209 916 68 164 815 159 272 677 201 88 349 148 Table 2. Saturation Flow Rates (veh/h) Movement Sat. Flow Per Lane Through Through & Right 1900 1850 Left 1700 Right 1500 2.
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