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What does an arrester bed in a runaway ramp use to stop a truck, and how does it work?
- A.A wall of water that sprays the brakes cool
- B.A downhill slope that lets the truck coast out
- C.Deep, loose gravel or similar material that creates heavy rolling resistance and sinks the wheels to drag the truck to a stop
- D.A steel cable that hooks the rear axle
Correct answer
C. Deep, loose gravel or similar material that creates heavy rolling resistance and sinks the wheels to drag the truck to a stop
Why
The bed trades distance for resistance: tires plowing through deep loose material slow far faster than brakes alone ever could. Drivers should steer straight into the bed and let it absorb the speed rather than fighting to steer back out.
Manual topic: Runaway Ramps - Arrester Beds · From the General Knowledge practice bank (GK-238).