Question To transport hazardous materials, a driver needs: Answers Only a CDL. A CDL with hazardous materials endorsement. A CDL with a tank endorsement. Explanation To drive a vehicle of any size that is used to transport hazardous materials, you must have a CDL with a hazardous materials endorsement. Take a FREE Practice Test Now This questions appears in the following tests: Arizona HazMat , California HazMat , Missouri HazMat , New Mexico HazMat , Oklahoma HazMat ,