The Hazardous Materials Regulations (HMR) of the Pipeline and Hazardous Materials Safety Administration within the U.S. Department of Transportation (USDOT/PHMSA) regulate the transportation of hazardous materials (HazMat) to, from, or through the U.S. by any mode. The four modes of…

The transport of a hazardous material can be accomplished by four modes (rail, highway, air, or water) and by even more forms of a transport vehicle.  If the mode of transport is highway, the transport vehicle used must be a…