Discuss the factors influencing highway design

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Task 2: The highway design

a. Discuss the factors influencing highway design

b. Provide a design of the highway, the design should include Minimum design speed, Recommended lane width and Preferable shoulder width, Right of Way, Maximum grade, and the minimum length of a vertical crest curve and sage vertical curve

c. Provide a summary report describing your route alignment and its major features. Give your reasons for selecting your highway features (maximum 500 words).

To determine the ADT on the road, the data was collected as shown below in table 4 on a Wednesday during the following hours.

Table 4: Traffic volume at a specific time

7:00–8:00 a.m 8:00 –9:00 a.m 9:00–10:00a.m 10:00–11:00 .m 11:00 –12 noon
150 120 130 50 20

Consider If the traffic is expected to be 150% from the current traffic up to June 2030,the grades for the curve is shown in table 5

Table 5: Grades for the curve

Up fill grade Down fill grade
+4 -2

Consider the following for the sage vertical curve criteria :(a) Stopping sight distance, (b) Comfort (c) General appearance

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