30. Almost half of all truck driver deaths are the result of:
Detailed Explanation
The correct answer is "Rollovers.". This question tests combination vehicles knowledge and the safest action expected of a commercial driver. For a differently worded version of this question, identify the hazard first and then choose the answer that preserves control, visibility, or legal compliance.
Correct Answer: Rollovers.
Why This Matters on the CDL Test
Use this as part of your Combination Vehicles review. The real CDL knowledge test rewards drivers who understand the reason behind each rule, not only the answer letter, so read the explanation and then try a few related questions.
How to Remember It
Say the rule in your own words, then explain why the wrong answers are unsafe or incomplete. That habit makes similar Combination Vehicles questions easier when the exam changes the wording.
Answer Review
Choose "Rollovers." because this answer matches the safe CDL action for combination vehicles knowledge. On the knowledge test, the safest answer is usually the one that protects space, control, visibility, legal compliance, or inspection accuracy before the vehicle is put at risk.
Why the other answers are weaker
- Speed."Speed." does not best answer this combination vehicles knowledge question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
- Following too closely."Following too closely." does not best answer this combination vehicles knowledge question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
Test-Day Checklist
- Read the question once for the topic, then read it again for the exact CDL action being tested in Combination Vehicles.
- Eliminate answers that sound convenient but skip an inspection, warning sign, or safety step.
- Say the correct rule out loud before moving on so you can recognize it when the exam changes the wording.
Ready to practice for real?
Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
69. More than half of truck driver deaths in crashes are the result of rollovers. Trucks turn over easier when fully loaded and are:
____ are the cause of more than half of all accident-related truck driver deaths.
32. Which type of truck-trailer combination has the best chance of the 'crack the whip' rollover?
37. In general, the higher your truck's center of gravity, the:
55. Compared to a straight truck or bus there are _________ things to inspect in combination vehicles.
Keep Studying Combination Vehicles
Question pages help you review one rule at a time. To build test-day speed, move back into the full Combination Vehicles practice test and answer a mixed set without looking at the explanation first.
State CDL Practice Paths
After you understand this answer, use a state practice path to connect the federal CDL rule with the DMV test pages drivers search for most.