To transport hazardous materials, what does a driver need? Question To transport hazardous materials, what does a driver need? Answers A CDL only A CDL with a hazardous materials endorsement A CDL with a tank endorsement A CDL with a cargo endorsement Explanation You must have a CDL with a hazardous materials endorsement to drive a vehicle of any size that is used for transporting hazardous materials. This questions appears in the following tests: Alaska HazMat Idaho HazMat Idaho Tank Iowa HazMat Kentucky HazMat Kentucky HazMat Maryland HazMat Missouri HazMat New Mexico HazMat Virginia HazMat