What is the legal definition of a vehicle in terms of transport on a highway?

The legal definition of a vehicle in the context of transportation on a highway encompasses every device that transports people or property. This broad definition includes a wide array of conveyances, not just those that are motorized. It recognizes various forms of transport, such as bicycles, motorcycles, trucks, and buses, all of which are used to carry individuals or goods.

The inclusion of "every device" illustrates the comprehensive nature of this definition, accounting for both traditional and non-traditional forms of transportation. This is important for road safety regulations and legal responsibilities regarding the operation of such devices on roadways.

Other options are limited in scope. For example, defining a vehicle strictly as any motorized machine would exclude non-motorized modes of transportation. Similarly, limiting the definition to only cars and trucks fails to recognize the vast array of vehicles used on highways today. Stationary rail devices do not fit into this definition as they are not designed for use on standard roadway systems. Thus, the chosen answer correctly encompasses all devices used for transporting people or property on highways.