Drivers need to obtain a commercial driver’s license (CDL) to operate large trucks and other large vehicles. Some trucking companies hire drivers who only have a CDL permit before and provide on-the-job training until the driver qualifies for their CDL. Your responsibilities and duties differ depending on the type of work you do, but you follow licensed drivers along their route to learn how to operate the vehicle, make stops, and load and unload. For example, as a bus driver, you may shadow a more experienced driver and learn how to deal with passengers, take bus fare, and address maintenance issues. As a delivery driver or someone who drives a truck with trailers, you work with a more experienced cargo driver before qualifying to drive on your own.