- A Pass on the right
- B Stay just behind it
- C Match its braking exactly
- D Maintain enough space to stop without hitting it if it brakes suddenly Correct answer
Why this is the correct answer
Adequate following distance is the single most effective rear-end-collision prevention measure.
How this topic appears on the test
The Combination Vehicles CDL exam covers Stopping distance as a recurring theme. Test-writers favor questions that probe whether the applicant has internalized the safe operating procedure, not merely memorized the rule. When you encounter a question on this topic, slow down and verify that the answer you've chosen describes what a careful, defensive driver would actually do — not what is technically permissible.
If you missed this question, that's exactly the right outcome of a practice session: the goal is to surface gaps before the actual test. Open your state CDL manual to the Stopping distance section and re-read the relevant subchapter. Then come back and run through the rest of the Combination Vehicles practice exam.