Discuss the factors influencing highway design
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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