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Why do low-clearance trailers, such as lowboys or car haulers, face a special risk at some crossings?
- A.Low trailers are harder for train engineers to see
- B.They can get hung up (high-centered) on raised crossings where the road humps over the rails
- C.Low trailers cross tracks faster than other trailers
- D.Their kingpins sit lower, which changes the coupling angle on tracks
Correct answer
B. They can get hung up (high-centered) on raised crossings where the road humps over the rails
Why
A humped crossing can lift a long, low trailer until its frame rests on the rails and its wheels lose grip. Drivers of low-clearance equipment must know their route and avoid crossings marked or shaped to cause this.
Manual topic: Combination Vehicles - Railroad Crossings · From the Combination Vehicles practice bank (CV-184).