What should an officer check when verifying brake functionality?

When verifying brake functionality, checking the brake pedal response is crucial because it directly indicates how well the brake system is functioning. An officer can assess if the brake pedal is firm or spongy, which can reveal potential issues with the braking system, such as air in the brake lines or low brake fluid. A proper brake pedal response should feel solid when pressed, indicating effective engagement of the brakes without excessive travel or resistance. This evaluation is essential for ensuring that the vehicle can safely stop as required.

In contrast, while speedometer readings, engine sounds, and visual signs of tire wear can provide some insights into the overall vehicle condition, they do not specifically evaluate the effectiveness of the braking system. Speedometer readings relate to vehicle speed, engine sounds can indicate numerous issues unrelated to brakes, and tire wear affects traction but does not directly assess brake functionality. Thus, focusing on brake pedal response is the most relevant and critical assessment in this context.