On what basis does the DOT classify vehicles?

The Department of Transportation (DOT) classifies vehicles based on whether they carry passengers or commodities because this distinction is crucial for regulatory, safety, and operational considerations. This classification helps to streamline various aspects of transportation, including routing, safety standards, and compliance with regulations that vary depending on the type of vehicle and its primary function.

Passenger vehicles, such as cars and buses, have different operational requirements, safety standards, and regulations compared to commercial vehicles that transport goods, such as trucks and vans. This classification directly impacts policies related to vehicle maintenance, inspection, and the training required for operators.

In contrast, the criteria of fuel type, color, and manufacturing year do not provide as relevant a framework for regulatory norms and safety considerations. While these factors may be important in specific contexts, they do not capture the operational roles that vehicles play within the transportation ecosystem as effectively as the distinction between those meant for passenger transport and those meant for carrying commodities.