Large trucks are likely to lose speed when:
- Driving up long or steep hills. ✓
- Driving in long, gradual curves.
- Driving down long, gradual hills.
Answer: A. Driving up long or steep hills.
Large trucks are likely to lose speed when driving up long or steep hills.
Why this is the answer
The handbook notes that large trucks can take longer to get up to speed when entering traffic, and it says plainly that large trucks, bicycles, and some cars lose speed on long or steep hills. A climb is where the weight of a big truck works against it, so expect it to slow down and give it room rather than crowding up behind it.
Why the other answers are wrong
- B. Driving in long, gradual curves. — Long, gradual curves are not what the handbook identifies as a place where trucks lose speed, so this does not match the stated rule.
- C. Driving down long, gradual hills. — The handbook ties speed loss to hills that are long or steep to climb, not to descending long, gradual hills.
Remember it
Picture a loaded truck grinding uphill: the climb is the slow spot, so plan your pass or your following distance there.