When stopping behind a truck on an uphill grade, you should leave extra space
- in case the truck rolls back when the driver starts to move ✓
- so you can be seen by cars ahead
- so that you don't breathe in the fumes
- so you can pull around him if he is slow to start
Answer: A. in case the truck rolls back when the driver starts to move
Leave extra space in front of your vehicle when stopped uphill behind a truck, in case it rolls back when the driver starts to move.
Why this is the answer
The handbook explains that a large vehicle stopped facing uphill may roll backwards when the driver releases the brake. To protect yourself, you should leave extra space in front of your vehicle so a rollback does not put the truck into you. The same section also covers general following distance, but the uphill stopping point is the specific one that fits this question.
Why the other answers are wrong
- B. so you can be seen by cars ahead — Being seen by cars ahead is not the reason the handbook gives for leaving that gap behind a truck on a hill.
- C. so that you don't breathe in the fumes — The handbook mentions spray, dirt, water and rocks from large vehicles, not exhaust fumes, as a reason to stay back.
- D. so you can pull around him if he is slow to start — Pulling around a slow-starting truck is not the purpose of the space; the handbook warns you to pass only when you are certain it is safe.
Remember it
Think of a heavy truck on a hill as needing a cushion to roll back into, so keep that gap in front of you.