How should the left and right turn signals be checked?

The appropriate method for checking the left and right turn signals is by stepping outside the bus to view them. This approach allows for a clear, direct observation of the signals to ensure they are functioning properly and are visible to other road users. Being outside the bus provides the best perspective on whether the lights are working correctly and whether they are bright enough to be seen from a distance, which can be critical for safety during turns and lane changes.

Observing the turn signals from outside the vehicle eliminates any obstructions or angles that might impede visibility from within the bus, which is especially important for a larger vehicle like a bus. This method guarantees that the inspections are thorough and reliable, ensuring the safety of both the driver and other road users.

Other options, such as using remote signals from the driver’s seat or checking through rearview mirrors, do not provide an adequate verification of signal functionality. These methods may miss issues with the signals that might not be apparent when viewed from inside the bus or from an indirect angle. Checking only during exterior light tests may not incorporate the systematic inspection that is vital for pre-trip safety checks.