We have had several inquiries on whether a driver with a restricted class B CDL is subject to random drug and alcohol testing.  All CDL drivers operating commercial motor vehicles (CMVs) (greater than 26,000 GVWR, or transporting more than 16 passengers, including the driver, or placarded hazardous materials) on public roadways must be DOT drug and alcohol tested. This applies to any driver required to possess a CDL, including those employed by Federal, State, and local government agencies, “owner operators,” and equivalently licensed drivers from foreign countries. Part-time drivers must also be included in an employer’s drug and alcohol testing program.