What should be checked about lights and indicators before driving a bus?

1. Confirm they operate, lenses are clean and undamaged, and the signals are visible
2. Use the dashboard telltale to confirm the indicators and externally inspect the headlamps
3. Test direction indicators but leave brake and marker lamps for the annual CVRT inspection
4. Accept one failed rear lamp on a well-lit route if the matching lamp on the other side works