A traffic stream has a density of 30 vehicles per kilometre and an average speed of 60 kilometres per hour. What is its flow rate?
Correct answer: D. 1,800 vehicles per hour
- A. 500 vehicles per hour
- B. 1,000 vehicles per hour
- C. 2,400 vehicles per hour
- D. 1,800 vehicles per hour
Explanation
Traffic flow equals density multiplied by average speed, so q = 30 × 60 = 1,800 vehicles per hour. The other values result from incorrect multiplication or division.
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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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