Traffic on a freeway gives a Greenshield's flow relationship expressed as:Q = 65k-0.354k2At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulderof the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on theside of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway,the patrol car notes that traffic on the freeway is moving along at about 60 kph.Determine the following:1. Capacity flow of the highway2. Traffic shockwave created by the road accident3. Time in AM the patrol car will reach the accident area4. Traffic shockwave line as plotted and shown in the Q-k traffic model diagram

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Engineering

Civil Engineering

Traffic on a freeway gives a Greenshield's flow relationship expressed as: Q = 65k-0.354k2

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 15P

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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 on a freeway gives a Greenshield's flow relationship expressed as:
Q = 65k-0.354k2
At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder
of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the
side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway,
the patrol car notes that traffic on the freeway is moving along at about 60 kph.
Determine the following:
1. Capacity flow of the highway
2. Traffic shockwave created by the road accident
3. Time in AM the patrol car will reach the accident area
4. Traffic shockwave line as plotted and shown in the Q-k traffic model diagram

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Traffic on a freeway gives a Greenshield's traffic flow relationship expressed as: Q = 60k-0.16667k? At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the patrol car notes that traffic on the freeway is moving along at about 40 kph. Determine the following: 1. Capacity flow of the highway 2. Traffic shockwave created by the road accident 3. Time in AM the patrol car will reach the accident zone 4. Plotted traffic shockwave line in the Q-k traffic model diagram
Traffic on a freeway gives a Greenshield's flow relationship expressed as: Q = 65k-0.354k2 At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the patrol car notes that traffic on the freeway is moving along at about 60 kph. Determine the following: 1. Capacity flow of the highway 2. Traffic shockwave created by the road accident 3. Time in AM the patrol car will reach the accident area 4. Traffic shockwave line as plotted and shown in the Q-k traffic model diagram Note: Show full solution. Do not copy in chegg it has different question Topic: Highway Engineering (Greenshield Model)
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