At 55 mph, perception distance is approximately 142 feet. This is the distance your vehicle travels from the time your eyes see a hazard until your brain recognizes it as a hazard.
The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.
This question is from the Class B CDL Knowledge Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.
Browse All Free CDL Practice Tests →