What danger could be associated with driving a tractor and trailer over a humpbacked bridge?

  1. The trailer's parking brake could automatically engage.
  2. The trailer could become detached.
  3. The tractor's suspension could smooth out the bump.
  4. The trailer could jack-knife.

Correct Answer

The trailer could become detached.

Explanation: Before towing a trailer; a driver should ensure that the tow hitch has sufficient ground clearance. If this hits the road; for example when travelling over a humpbacked bridge; there is a danger that the trailer will become detached. Drivers should also plan and carry out their journey with an awareness of this risk.

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