Michigan Commercial Driver's License (CDL) Practice Exam

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What is a necessary safety feature for loads extending significantly beyond a vehicle's rear?

Reflective warning signs
Red lights
Additional mirrors
Extended frames

The correct answer is: Red lights

The necessary safety feature for loads extending significantly beyond a vehicle's rear is reflective warning signs. These signs are crucial as they help alert other motorists to the potential hazard of the extended load. When a load protrudes, it can become a danger, particularly during low visibility conditions or at night. Reflective warning signs are designed to be easily visible, helping to prevent accidents by ensuring that following drivers are aware of the abnormal load size. While red lights, additional mirrors, and extended frames may have their own roles in vehicle safety or load management, they do not specifically address the immediate visual signaling that reflective warning signs provide to oncoming or following traffic regarding the extension of the load.