What type of vehicle is obliged to have its inside lights turned-on during “light time”?

1. Taxis.
2. None: Inside lights in vehicles should not be turned-on. The light reflects in the front windshield and disturbs the driver.
3. Any commercial vehicle transporting passengers for hire.
4. Correct answer: Buses.

WhyDuring lighting-up time, interior lights are required in buses. There is no such requirement for taxis or other vehicles.