- A 10 feet behind only
- B 5 feet to the front and rear
- C 500 feet behind only
- D 10 feet to the rear, 100 feet behind, and 100 feet ahead of the vehicle Correct answer
Why this is the correct answer
Two-lane two-way roads require triangles at 10 feet behind, 100 feet behind, and 100 feet ahead so traffic from both directions sees the warning.
How this topic appears on the test
The General Knowledge CDL exam covers Accident procedures 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 Accident procedures section and re-read the relevant subchapter. Then come back and run through the rest of the General Knowledge practice exam.
For drivers preparing for the General Knowledge CDL exam, additional context — including federal manual excerpts, employer hiring practices, and DOT medical guidance — is widely available from industry resources. Continue reading on a recommended industry resource for further detail. Always cross-check anything you read with the current edition of your state CDL manual, since enforcement guidance is updated periodically.