Class A CDL Pre-Trip Inspection Practice Exam 2025 - Free CDL Practice Questions and Study Guide

During a pre-trip inspection, it is crucial that all lights on the vehicle are in proper working condition and exhibit the correct color, which is typically amber for certain lights. This ensures visibility and communication with other drivers, which are essential for safety on the road. The operational status of the lights, including turn signals, brake lights, headlights, and marker lights, is a primary safety feature that enables effective signaling and helps prevent accidents.

Having all lights functioning correctly also complies with regulations set forth by the Department of Transportation and similar governing bodies. A well-lit vehicle is less likely to be involved in incidents due to other drivers not seeing it or misinterpreting its signals. Therefore, every light must be checked for operation and proper color as part of the pre-trip inspection routine.