The traffic demand for a six-lane urban arterial road (three lanes per direction) is given in the tablebelow. The relationship between flow and density for this road follows GreenShiled's model, witha free flow speed of 105 km/h and a jam density of 92 veh/km/lane. Two of the three lanes of theEB direction were closed at 5:00 AM for maintenance. The two lanes were re-opened at 8:00 AM,allowing the traffic to be released at capacity conditions.a) What is the maximum length of the queue upstream of the bottleneck?b) At what time the queue upstream of the bottleneck will be fully dissipated?c) What is the furthest point upstream of the bottleneck that will be impacted by the laneclosure?d) Draw the shock wave diagram showing shock wave speeds, critical times, and distances.Time5:006:00 AM6:00 7:00 AM7:00 8:00 AM8:00 9:00 AM9:00 10:00 AM10:00 11:00 AMDemand (vph)200040006400600036003000

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a) What is the maximum length of the queue upstream of the bottleneck? b) At what time the queue upstream of the bottleneck will be fully dissipated? c) What is the furthest point upstream of the bottleneck that will be impacted by the lane closure? d) Draw the shock wave diagram showing shock wave speeds, critical times, and distances.

a) What is the maximum length of the queue upstream of the bottleneck? b) At what time the queue upstream of the bottleneck will be fully dissipated? c) What is the furthest point upstream of the bottleneck that will be impacted by the lane closure? d) Draw the shock wave diagram showing shock wave speeds, critical times, and distances.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

The traffic demand for a six-lane urban arterial road (three lanes per direction) is given in the table
below. The relationship between flow and density for this road follows GreenShiled's model, with
a free flow speed of 105 km/h and a jam density of 92 veh/km/lane. Two of the three lanes of the
EB direction were closed at 5:00 AM for maintenance. The two lanes were re-opened at 8:00 AM,
allowing the traffic to be released at capacity conditions.
a) What is the maximum length of the queue upstream of the bottleneck?
b) At what time the queue upstream of the bottleneck will be fully dissipated?
c) What is the furthest point upstream of the bottleneck that will be impacted by the lane
closure?
d) Draw the shock wave diagram showing shock wave speeds, critical times, and distances.
Time
5:00
6:00 AM
6:00 7:00 AM
7:00 8:00 AM
8:00 9:00 AM
9:00 10:00 AM
10:00 11:00 AM
Demand (vph)
2000
4000
6400
6000
3600
3000

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