Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 15, Problem 1P
To determine
(a)
Suitable design speed for the rural collector highway.
Expert Solution
Answer to Problem 1P
Explanation of Solution
Given information:
In mountains terrain is designed to carry volume of
For a rural collector highway located in mountains terrain is designed to carry a design volume
From the table the design speed for
To determine
(b)
Lane and usable shoulder lengths for the rural collector highway.
Expert Solution
Answer to Problem 1P
Lane=
Shoulder =
Explanation of Solution
Given information:
In mountains terrain is designed to carry volume of
For a rural collector highway located in mountains terrain is designed to carry a design volume
From the figure
Width of shoulder is total
To determine
(c)
Maximum desirable grade for the rural collector highway.
Expert Solution
Answer to Problem 1P
Maximum desirable grade=
Explanation of Solution
Given information:
In mountains terrain is designed to carry volume of
From the Table
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Students have asked these similar questions
A two-lane rural highway carries a peak hour volume of 465 (vph) and has the following characteristics:
Roadway: 60mph design; 11 foot lanes, 2 foot shoulders; rolling terrain; 60% no-passing zones; length = 3 miles.
Traffic: 70/30 directional split; 4% trucks; 2 percent recreational vehicles; 1 percent buses; PHF = 0.95
a) What Level of Service will the highway operate under during peak periods?
b) What is the capacity of the highway? Explain why this is less than 2,800 (vph)?
A four-lane freeway (two lanes in each direction)
operates at capacity during the peak hour. It has
11-ft lanes, 4-ft shoulders, and there are three
ramps within three miles upstream of the
segment midpoint and four ramps within three
miles downstream of the segment midpoint. The
freeway has only regular users, there are 8% large
trucks and buses (no recreational vehicles), and it
is on rolling terrain with a peak-hour factor of
0.85. It is known that 12% of the AADT occurs in
the peak hour and that the directional factor is
0.6. What is the freeway's AADT?
A long segment of suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.
Chapter 15 Solutions
Traffic and Highway Engineering
Knowledge Booster
Similar questions
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