People often mix this up with CDL class, but they are different things. A Class A, B, or C CDL tells you what kind of commercial vehicle a person may drive. Interstate versus intrastate tells you where and under what regulatory system that driving happens. Interstate CDL operation means hauling people or property across state lines, or hauling cargo that is part of interstate commerce even if the truck stays within one state. Intrastate CDL operation means driving only within one state, for business that begins and ends there.

That difference affects which rules apply to the driver. Interstate drivers usually must meet federal FMCSA standards, including medical certification under 49 C.F.R. Part 391. Intrastate drivers may follow state-only rules if the state allows it. In Wisconsin, CDL holders self-certify their driving type with the Wisconsin DMV under Wis. Stat. ch. 343, and many federal CDL standards are adopted through state enforcement as well.

For an injury claim, this can matter a lot. If a truck driver was operating interstate but lacked the required medical card, endorsements, or compliance records, that may support evidence of negligence, negligence per se, or poor company oversight. It can also shape what records a lawyer requests, such as driver qualification files, logs, and training documents. In a state like Wisconsin, where dairy, feed, and farm freight move constantly, whether a trip was truly intrastate or part of interstate commerce can become a key disputed fact.