Hazmat is short for hazardous materials — cargo like fuels, chemicals, explosives, or other dangerous goods that are federally controlled because of the risk they pose. Moving them comes with strict rules on labeling, paperwork, and handling.
Only a driver who holds a hazmat endorsement on their CDL — which requires extra testing and a background check — can legally haul it. Hazmat loads often pay more, reflecting the added qualifications, restrictions, and responsibility involved.