In highway geometric design, design speed is the speed used primarily to determine which set of features?
Correct answer: C. Horizontal curves, sight distance and superelevation
- A. Pavement colour and aggregate shape
- B. Traffic signal timing and lane markings
- C. Horizontal curves, sight distance and superelevation
- D. Bridge bearings and drainage outlet size
Explanation
Design speed provides the basis for selecting geometric elements such as curve radius, sight distance and superelevation. It does not directly determine pavement colour or bridge bearing details.
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About Transportation Engineering
Transportation engineering covers highway planning and alignment, traffic studies, road geometric design, pavement materials and flexible or rigid pavement construction. It also includes railway, airport and traffic engineering concepts such as sight distance, superelevation, signals, capacity and level of service, distinguishing pavement failure from poor geometric design.
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