On a two-lane highway, which factor most directly reduces the capacity of the facility?
Correct answer: B. A high proportion of slow heavy vehicles
- A. A uniform pavement colour
- B. A high proportion of slow heavy vehicles
- C. A wider road shoulder beyond the carriageway
- D. A lower number of roadside advertisements
Explanation
Slow heavy vehicles occupy road space and reduce passing opportunities, especially on two-lane roads. The other factors do not normally reduce traffic capacity in the same direct way.
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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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