What is defined as a self-propelled vehicle or one propelled by electric power from overhead trolley wires?

The definition of a self-propelled vehicle encompasses any vehicle that is capable of moving on its own without the need for external force, as long as it is powered by electricity or an internal combustion engine. This includes cars, trucks, and buses that operate using gasoline or diesel, as well as electric vehicles that draw power from sources such as batteries or overhead trolley wires. Therefore, categorizing these types of vehicles as 'motor vehicles' aligns perfectly with this broad definition.

The other options, while relevant in different contexts, do not accurately describe the entire spectrum of self-propelled vehicles. Public transport refers specifically to services like buses and trains intended for mass transit but does not encompass all self-propelled vehicles like personal cars. Non-motorized vehicle indicates vehicles that do not run on engines, such as bicycles or scooters, which clearly does not fit the definition provided. Utility vehicles typically refer to a specific class of vehicles designed for hauling, pushing, or other work-based tasks and may not include all motorized forms, particularly those powered electrically.