For a traffic stream, time mean speed is calculated as the:
Correct answer: B. Arithmetic mean of spot speeds at a location
- A. Harmonic mean of travel speeds over a section
- B. Arithmetic mean of spot speeds at a location
- C. Average speed obtained by dividing density by flow
- D. Speed of the slowest vehicle in the stream
Explanation
Time mean speed is the arithmetic average of the individual vehicle speeds passing a fixed point. Space mean speed is different because it is based on travel times over a road section and uses a harmonic mean.
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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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