A driver needs a CDL with a hazardous materials endorsement to transport hazardous materials in: Question A driver needs a CDL with a hazardous materials endorsement to transport hazardous materials in: Answers A vehicle requiring a Class A license. A vehicle requiring a Class B license. A vehicle requiring a Class C license. Any sized vehicle. Explanation You must have a CDL with a hazardous materials endorsement to operate a vehicle of any size to transport hazardous materials. This questions appears in the following tests: Arkansas HazMat Florida Tank Georgia HazMat Indiana HazMat Kansas Tank Maryland HazMat New Jersey HazMat New York Tank North Carolina HazMat Wyoming HazMat