Section 2(28) of the Motor Vehicles Act, 1988 defines 'motor vehicle' to include any mechanically propelled vehicle adapted for use upon roads, whether its power of propulsion is transmitted thereto from an external or internal source. It excludes vehicles running on fixed rails.

1. 1 Pick up MV Act, 1988.
2. 2 Go to Section 2 — Definitions.
3. 3 Find the definition of 'motor vehicle' — mechanically propelled, adapted for roads, excludes fixed rail vehicles.