What is a distinct characteristic of a commercial driver’s license (CDL)?

A commercial driver’s license (CDL) is distinguished by its requirement for a higher standard of qualification due to the responsibilities and regulations associated with operating commercial vehicles. Obtaining a CDL necessitates passing both written and practical driving tests that evaluate the driver's knowledge of safety regulations, vehicle operation, and the particular challenges associated with driving larger and more complex vehicles, such as trucks and buses.

This elevated standard is in place to ensure that drivers are adequately trained to handle the unique demands of commercial driving, including maneuvering heavy loads, adhering to specific safety protocols, and responding to various road conditions. This rigorous qualification process is critical in promoting safety on the roads and reducing the likelihood of accidents involving commercial vehicles.

In contrast, other options do not align with the defining characteristics of a CDL: it is not limited to cars, does not allow unlimited driving privileges, and is indeed mandatory for operating heavy trucks.