“Motor truck cargo insurance may be a federal requirement depending on what is being hauled and the rules can vary in each state. However, most businesses require their truckers to have this type of insurance, making it a stipulation of their contract.
The value of the goods transported will often change, so make sure to pick a limit that will adequately cover your exposure.
If you are required to carry cargo insurance, the federal requirement is $5,000, but it is in your best interest to have more. For example, some contracts require $100,000 of coverage, while hazardous materials may need $2 million worth of coverage.”