If the average time headway between vehicles in a traffic lane is 3 seconds, the corresponding flow rate is approximately:
Correct answer: A. 1,200 vehicles per hour
- A. 1,200 vehicles per hour
- B. 900 vehicles per hour
- C. 600 vehicles per hour
- D. 3,600 vehicles per hour
Explanation
Flow is the reciprocal of time headway when expressed in consistent units. Thus, 3,600 divided by 3 gives approximately 1,200 vehicles per hour.
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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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