Intrastate vs. Interstate: Which is Which?

Part 390.5 of the Federal Motor Carrier Safety Regulations (FMCSR) defines interstate and intrastate commerce in the following manner: Interstate commerce means trade, traffic, or transportation in the United States — (1) Between a place in a state and a place outside of such state (including a place outside of the United States); (2) Between two places in a state through another state or a place outside of the United States; or (3) Between two places in a state as part of trade, traffic, or transportation originating or terminating outside the state or the United States.