Traffic flow on a four-lane (one direction) freeway can be described by the Green- shields model. Two lanes of the four lanes on a section of this freeway will have to be closed to undertake an emergency bridge repair that is expected to take 2 hr. The mean free speed of the highway is 60 mi/h and the jam density is 140 veh/mi/ln. If it is estimated that the demand flow on the highway during the emergency repairs is 80% of the capacity, using the deterministic approach, determine: (a) The capacity of the highway per one lane, and per all 4-lanes (b) The reduced capacity of the highway after closure (c) Maximum queue length that will be formed (d) The total delay (e) The number of vehicles that will be affected by the incident (f) The average individual delay

Traffic flow on a four-lane (one direction) freeway can be described by the Green- shields model. Two lanes of the four lanes on a section of this freeway will have to be closed to undertake an emergency bridge repair that is expected to take 2 hr. The mean free speed of the highway is 60 mi/h and the jam density is 140 veh/mi/ln. If it is estimated that the demand flow on the highway during the emergency repairs is 80% of the capacity, using the deterministic approach, determine: (a) The capacity of the highway per one lane, and per all 4-lanes (b) The reduced capacity of the highway after closure (c) Maximum queue length that will be formed (d) The total delay (e) The number of vehicles that will be affected by the incident (f) The average individual delay

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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Concept explainers

Capacity and Level of Service at Intersections

The term capacity is associated with transportation engineering. Capacity helps to understand how many pedestrians or vehicles can be handled by a transport facility. Level of service is also a term associated with transportation engineering. The level of service indicates the performance of the transport facility.

Question

Traffic flow on a four-lane (one direction) freeway can be described by the Green-
shields model. Two lanes of the four lanes on a section of this freeway will have to be
closed to undertake an emergency bridge repair that is expected to take 2 hr. The
mean free speed of the highway is 60 mi/h and the jam density is 140 veh/mi/ln. If it
is estimated that the demand flow on the highway during the emergency repairs is
80% of the capacity, using the deterministic approach, determine:
(a) The capacity of the highway per one lane, and per all 4-lanes
(b) The reduced capacity of the highway after closure
(c) Maximum queue length that will be formed
(d) The total delay
(e) The number of vehicles that will be affected by the incident
(f) The average individual delay

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