The Federal Motor Carrier Safety Administration (FMCSA) requires that interstate truckers (which includes most of the truckers on the roadway) maintain minimum levels of insurance coverage depending on the type of cargo they carry.
$300,000 for non-hazardous cargo that is transported in vehicles weighing less than 10,001 pounds.
$750,000 for general freight carriers. The requirement can go up to $5,000,000 depending on what is being transported.
$1,000,000 for private carriers of oil and some types of hazardous waste.
$5,000,000 for carriers of different types of hazardous substances.