What does a motor vehicle include according to traffic classifications?

A motor vehicle, according to traffic classifications, includes any self-propelled vehicle or those that utilize electric power from overhead trolley wires. This definition encompasses a wide array of transportation means, including cars, buses, and certain types of trains, which operate on tracks but may use electric propulsion. The classification focuses on the fact that these vehicles are designed to transport passengers or goods, emphasizing their self-propelled nature or reliance on overhead electric systems.

In contrast, vehicles propelled solely by human power do not fall under the definition of motor vehicles, as they lack the self-propulsion characteristic. Similarly, vehicles limited to off-road use are typically classified differently due to their design and intended function, which are not generally suitable for public roads. Lastly, vehicles with less than four wheels might include bicycles or tricycles, which also do not meet the criteria for motor vehicles, as they lack motorized propulsion mechanisms. Thus, the correct classification ensures clarity in traffic regulations and vehicle responsibilities on roadways.