The lane of a 2-lane one way carriageway is closed for repairs. The maximum mean free speed under conditions of low flow in the 2-lane portion is 65km/hr. Under conditions of low flow, observations
The lane of a 2-lane one way carriageway is closed for repairs. The maximum mean free speed under conditions of low flow in the 2-lane portion is 65km/hr. Under conditions of low flow, observations
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The lane of a 2-lane one way carriageway is closed for repairs. The maximum mean free speed under conditions of low flow in the 2-lane portion is 65km/hr. Under conditions of low flow, observations show that the maximum mean free speed in the bottleneck is also 65km/hr. The average space headway when vehicles are stationary is 12.5m. The volume of traffic on the 2-lane road is 1800 veh/hr. Assuming that the speed-concentration relation is linear, find
- The mean speed of traffic through the bottleneck caused by the closure of one lane;
- The mean speed of traffic in the congested conditions immediately on the approach to the bottleneck
- The mean speed of traffic on the carriageway clear of the influence of the bottleneck
- The rate at which the queue of the congested traffic enter
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