How can you ensure smooth braking of a large commercial vehicle?
- Maintain a following distance of at least 5 seconds.
- Drive at a speed that allows you to see a safe distance ahead.
- Brake early to spread out the braking load.
- Do all of the above. ✓
Answer: D. Do all of the above.
Do all of the above: keep a safe following distance, drive at a speed that lets you see far enough ahead, and brake early to spread out the braking load.
Why this is the answer
The handbook's checklist for a smooth, controlled stop brings these together: travel at a speed that lets you see a safe distance ahead, keep a safe following time or distance, and use good braking skills. For large heavy vehicles it says never less than five seconds behind at highway speeds. It also advises planning gradual stops, easing brake pressure just before stopping to avoid a jerk, and looking ahead to slow down early rather than braking at the last minute. So each listed habit supports smooth braking, and the combined choice fits best.
Why the other answers are wrong
- A. Maintain a following distance of at least 5 seconds. — Keeping at least five seconds back helps, but it is only the following-distance part of smooth braking and does not cover speed choice or braking technique.
- B. Drive at a speed that allows you to see a safe distance ahead. — Driving at a speed that lets you see far enough ahead helps, but it is only the speed-planning part and does not cover following distance or braking technique.
- C. Brake early to spread out the braking load. — Braking early to spread out the braking load helps, but it is only the braking-technique part and does not cover speed choice or following distance.
Remember it
Treat the brake pedal as the last step in a stop you already planned.