PROBLEM 1. Consider a signalized intersection approach in which the arrival rates aredifferent during the effective green and red times during a given phase. During the effectivegreen, there is only one lane group with an arrival rate of 2,400 vehicles per hour and 2700vehiclesper hour during the rest of the cycle (during the effective red). The cycle length is of 90seconds, the effective green is 30 seconds and the saturation rate is 8,000 veh/h.Questions:a) Estimate the average uniform delay for this approachb) Consider that this approach has an upgrade of 4%. The total width of the cross street atthis intersection is 60 feet. The average vehicle length of approaching traffic is 16 feet.The speed of approaching traffic is 40 mi/h. Determine the sum of the minimumnecessary change and clearance intervals.

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Answered: a) Estimate the average uniform delay…

Engineering

Civil Engineering

a) Estimate the average uniform delay for this approach

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter8: Intersection Control

Section: Chapter Questions

Problem 24P

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Question

PROBLEM 1. Consider a signalized intersection approach in which the arrival rates are
different during the effective green and red times during a given phase. During the effective
green, there is only one lane group with an arrival rate of 2,400 vehicles per hour and 2700
vehicles
per hour during the rest of the cycle (during the effective red). The cycle length is of 90
seconds, the effective green is 30 seconds and the saturation rate is 8,000 veh/h.
Questions:
a) Estimate the average uniform delay for this approach
b) Consider that this approach has an upgrade of 4%. The total width of the cross street at
this intersection is 60 feet. The average vehicle length of approaching traffic is 16 feet.
The speed of approaching traffic is 40 mi/h. Determine the sum of the minimum
necessary change and clearance intervals.

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