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Why are runaway ramps often built on the outside of a curve or straight beyond a downgrade section?
- A.Ramps double as scenic overlooks
- B.Land there is always the cheapest
- C.Curves make gravel work faster
- D.A truck that cannot slow for the curve is the one that needs the ramp, so the ramp continues the path the runaway truck is already on
Correct answer
D. A truck that cannot slow for the curve is the one that needs the ramp, so the ramp continues the path the runaway truck is already on
Why
A runaway truck cannot make the turn the road demands, so the ramp is placed where its natural, unsteered path leads. That geometry is also why entering the ramp asks for a straight line rather than a sharp steering correction.
Manual topic: Runaway Ramps - Ramp Design · From the General Knowledge practice bank (GK-248).