1- A study of freeway flow at a particular site has resulted in a calibrated speed-density relationship, as follows u = 57.5(10.008k) a) Find the free-flow speed and jam density b) Derive the equations describing flow versus speed and flow versus density c) Determine the capacity of the road 2- A rural freeway has a demand volume of 6750 v/hr. It has four 3.4 m lanes in each direction. The traffic stream is comprised of 8% heavy vehicles and a PHF of 0.94. The terrain is rolling throughout the segment. What is the level of service for the facility? What is the capacity? 3- For an urban freeway, how many 3.6 m lanes in each direction are needed to achieve LOS C on a freeway with a peak hour traffic volume of 5725 v/hr and with a PHF = 0.967 The traffic stream is comprised of 11% heavy vehicles and the location is level terrain.
1- A study of freeway flow at a particular site has resulted in a calibrated speed-density relationship, as follows u = 57.5(10.008k) a) Find the free-flow speed and jam density b) Derive the equations describing flow versus speed and flow versus density c) Determine the capacity of the road 2- A rural freeway has a demand volume of 6750 v/hr. It has four 3.4 m lanes in each direction. The traffic stream is comprised of 8% heavy vehicles and a PHF of 0.94. The terrain is rolling throughout the segment. What is the level of service for the facility? What is the capacity? 3- For an urban freeway, how many 3.6 m lanes in each direction are needed to achieve LOS C on a freeway with a peak hour traffic volume of 5725 v/hr and with a PHF = 0.967 The traffic stream is comprised of 11% heavy vehicles and the location is level terrain.
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 25P
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Transcribed Image Text:1- A study of freeway flow at a particular site has resulted in a calibrated speed-density
relationship, as follows
u = 57.5(10.008k)
a) Find the free-flow speed and jam density
b) Derive the equations describing flow versus speed and flow versus density
c) Determine the capacity of the road
2- A rural freeway has a demand volume of 6750 v/hr. It has four 3.4 m lanes in each direction.
The traffic stream is comprised of 8% heavy vehicles and a PHF of 0.94. The terrain is rolling
throughout the segment. What is the level of service for the facility? What is the capacity?
3- For an urban freeway, how many 3.6 m lanes in each direction are needed to achieve LOS C
on a freeway with a peak hour traffic volume of 5725 v/hr and with a PHF = 0.967 The traffic
stream is comprised of 11% heavy vehicles and the location is level terrain.
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