How should you check if all emergency lights are functioning?

To ensure all emergency lights are functioning properly, testing them during the operation of the vehicle is essential. This method allows you to observe the lights in real-time, confirming not only that they are powered on but also how they perform under actual driving conditions. It is crucial to know that the emergency lights are visible and functioning when you are on the road, as they play a vital role in safety, especially in emergencies where visibility to other drivers is needed.

Checking the emergency lights while the vehicle is stationary may not accurately depict their effectiveness when in motion. Observing them while driving allows the driver to ensure that they are bright enough and correctly positioned to alert other drivers effectively. This proactive approach to safety is fundamental for any commercial driver.