Which of the following are true about a humpback railway crossing?
- (a) It is a railway crossing where a hump has formed.
- (b) It presents a danger to low-clearance vehicles.
- (c) It presents a danger to trains.
- Both (a) and (b) are true. ✓
Answer: D. Both (a) and (b) are true.
Both statements are true: a humpback crossing is a railway crossing where a hump has formed, and it is dangerous for low-clearance vehicles.
Why this is the answer
The handbook says humps may develop at railway crossings as time passes, and it calls these humpback crossings. It explains the hazard they create: low-clearance vehicles are at risk because low-bed trailers can get stuck on the surface or rails, and items like dolly wheels or tool boxes can snag on the rail. That supports both the description of a formed hump and the warning about danger to low-clearance vehicles. The passage does not say the crossing is a danger to trains.
Why the other answers are wrong
- A. (a) It is a railway crossing where a hump has formed. — This choice mentions only the formed hump and omits the low-clearance hazard that the handbook pairs with it.
- B. (b) It presents a danger to low-clearance vehicles. — This choice mentions only the low-clearance hazard and leaves out the formed hump that defines the crossing.
- C. (c) It presents a danger to trains. — The handbook warns about danger to low-clearance vehicles, not to trains.
Remember it
Think hump means hang-up risk for low vehicles.
Official handbook: ICBC Driving Commercial Vehicles, 3 Basic driving skills – Crossings, p. 54