Which of the following vehicles must be equipped with a reverse-drive buzzer?

1. All commercial vehicles must be equipped with this buzzer.
2. Vehicles with an all up weight of 12,000 kg or less.
3. Vehicles with an all up weight of more than 4,000 kg.
4. Correct answer: Commercial vehicles and work vehicles with an all up weight of more than 15,000 kg, tractors and buses.

WhyA reverse buzzer is required on commercial and work vehicles over 15,000 kg, on tractors and on buses. It is hard to see behind them.