Traffic and Highway Engineering - With Mindtap
Traffic and Highway Engineering - With Mindtap
5th Edition
ISBN: 9781305360990
Author: Garber
Publisher: CENGAGE L
Question
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Chapter 15, Problem 1P
To determine

(a)

Suitable design speed for the rural collector highway.

Expert Solution
Check Mark

Answer to Problem 1P

30 mi/h

Explanation of Solution

Given information:

In mountains terrain is designed to carry volume of 800 veh/day.

  Traffic and Highway Engineering - With Mindtap, Chapter 15, Problem 1P , additional homework tip  1

For a rural collector highway located in mountains terrain is designed to carry a design volume 800 veh/day is given Table 15.1 from the textbook.

From the table the design speed for 800 veh/day is 30 mi/h.

To determine

(b)

Lane and usable shoulder lengths for the rural collector highway.

Expert Solution
Check Mark

Answer to Problem 1P

Lane= 12ft

Shoulder = 5ft.

Explanation of Solution

Given information:

In mountains terrain is designed to carry volume of 800 veh/day.

For a rural collector highway located in mountains terrain is designed to carry a design volume 800 veh/day is given figure 15.5 from the textbook.

  Traffic and Highway Engineering - With Mindtap, Chapter 15, Problem 1P , additional homework tip  2

From the figure 15.5 the width of lane is 12ft.

Width of shoulder is total 10 ft on each side of road is 5ft.

To determine

(c)

Maximum desirable grade for the rural collector highway.

Expert Solution
Check Mark

Answer to Problem 1P

Maximum desirable grade= 10%

Explanation of Solution

Given information:

In mountains terrain is designed to carry volume of 800 veh/day.

  Traffic and Highway Engineering - With Mindtap, Chapter 15, Problem 1P , additional homework tip  3

From the Table 15.3(ae) the maximum desirable grade for design speed is 10%.

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