7. When becomes possible to have a high density on a highway, but a flow of approximately 0 veh/hr?
7. When becomes possible to have a high density on a highway, but a flow of approximately 0 veh/hr?
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 16P
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Answer question 7
![7. When becomes possible to have a high density on a highway, but a flow of approximately 0 veh/hr?
8. The following figure shows an example of an aerial photo taken of 500 ft of roadway. It shows vehicles
traveling at constant speeds on a rural highway of two-lanes (one per direction). A researcher standing
at the beginning of the section observed 3 vehicles passing during a period of 11 seconds. The
velocities of each vehicle across the 500 ft were as 60 mph, 30 mph and 40 mph, respectively. Calculate
the flow, density and space-mean-speed based on the schematic.
160'
60'
20¹
20¹
120'
40 mph
30 mph
B
500'
20¹
60 mph
A
100'
Direction of flow](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb816de81-d091-4434-aa0d-8a250bb5db6b%2F855ed02f-d73f-4bf2-9f33-2562b04bd3ba%2Fd15sdmh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:7. When becomes possible to have a high density on a highway, but a flow of approximately 0 veh/hr?
8. The following figure shows an example of an aerial photo taken of 500 ft of roadway. It shows vehicles
traveling at constant speeds on a rural highway of two-lanes (one per direction). A researcher standing
at the beginning of the section observed 3 vehicles passing during a period of 11 seconds. The
velocities of each vehicle across the 500 ft were as 60 mph, 30 mph and 40 mph, respectively. Calculate
the flow, density and space-mean-speed based on the schematic.
160'
60'
20¹
20¹
120'
40 mph
30 mph
B
500'
20¹
60 mph
A
100'
Direction of flow
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