What is a "work vehicle"?

1. AA vehicle intended for carrying passengers, which may also be used for carrying out work on the road.
2. BA vehicle whose driving speed does not exceed 40 km/h and which is used for works on the road.
3. CA vehicle on which equipment used for carrying out work is mounted, and which is not intended for carrying a load or carrying passengers.
4. DA vehicle used for transporting goods for hire.

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