Motor carriage

The vehicle mentioned above is neither a motor vehicle nor a motor carriage. A fat bike, as these vehicles are commonly called, is considered a pedal-assisted bicycle under the Road Traffic Act.
The law and the CBR distinguish between motor vehicles and motor carriages.
The definition of motor vehicles in the Road Traffic Regulations and Traffic Signs Regulations includes all motorised vehicles, except mopeds (including scooters), pedal-assisted bicycles, and disabled persons vehicles, intended to be propelled other than along rails.

The definition of motor carriages does include mopeds: all vehicles intended to be propelled other than along rails, solely or partly by mechanical power, either on or attached to the vehicle itself, or by electric traction with power supplied from elsewhere, with the exception of pedal-assisted bicycles.

Examples of motor carriages: car, motorcycle, bus, tractor, moped, scooter, microcar, and moped.

Trains, trams, and metros are neither motor vehicles nor motor carriages according to the Road Traffic Act.

The Road Traffic Act (RVV) does not define motor carriages. The Main Road Traffic Act (WVW) does:

Article 1c of the Main Road Traffic Act.
Motor carriages: all vehicles intended to be propelled other than along rails, solely or partly by mechanical power, either on or attached to the vehicle itself, or by electric traction with power supplied from elsewhere, with the exception of bicycles with pedal assistance.