The space mean speed of vehicles over a road section is calculated using the:
Correct answer: D. Harmonic mean of vehicle speeds
- A. Arithmetic mean of vehicle speeds
- B. Modal value of vehicle speeds
- C. Geometric mean of vehicle speeds
- D. Harmonic mean of vehicle speeds
Explanation
Space mean speed represents the average speed over a specified road length and is calculated as the harmonic mean of individual speeds. The arithmetic mean gives time mean speed when speeds are measured at one point.
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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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