Under federal law, interstate transportation is any movement of people, goods, or vehicles that crosses a state or national border, passes through another state on the way between two points in the same state, or forms part of a larger shipment that originated in or is bound for another state or country. That classification matters because it decides whether federal agencies or a state regulator governs the activity, which criminal statutes reach the conduct, and which safety and registration rules apply to the driver and the company. The reach is wider than most people expect. Goods that never physically leave a state can still be in interstate commerce if they are one leg of a longer journey.
The Federal Definition
The controlling definition sits in 49 CFR 390.5. Interstate commerce is trade, traffic, or transportation in any of three situations:
- Movement between a place in one state and a place in another state or country.
- Movement between two places in the same state when the route passes through another state or country.
- Movement between two places in the same state when the cargo or passengers are part of a shipment that originated in or is headed to another state or country.1eCFR. 49 CFR 390.5 – Definitions
The third category is the one that catches operators off guard. A driver hauling freight between two Ohio cities may assume the trip is purely a state matter. If that freight came off a container ship from overseas, or is headed to a warehouse where it will be reloaded for Pennsylvania, the entire movement counts as interstate commerce. The origin and intended destination of the shipment carry as much weight as the physical path of any single vehicle.2Federal Motor Carrier Safety Administration. What Is the Difference Between Interstate Commerce and Intrastate Commerce?
Interstate Versus Intrastate
Intrastate transportation stays entirely within one state. A truck that picks up California-origin cargo in Los Angeles and delivers it in San Francisco, where the freight stays, is intrastate and falls under California’s rules.
The stakes of the line are real. Interstate carriers must register with federal agencies, meet federal safety standards, and follow federal driver-qualification rules. Intrastate carriers answer to state regulators, whose requirements often look different. Because the classification turns partly on where cargo starts and ends rather than where the truck actually drives, a company can be running interstate operations without realizing it.
Where the Federal Power Comes From
All of this rests on Article I, Section 8, Clause 3 of the Constitution, which gives Congress the power “[t]o regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes.”3Constitution Annotated. Article I Section 8 Clause 3 – Commerce In United States v. Lopez (1995), the Supreme Court described the reach of that power in three parts. Congress can regulate the channels of interstate commerce, meaning highways, waterways, rail lines, and airways. It can protect the instrumentalities of interstate commerce, including vehicles, aircraft, and the people and things moving in commerce. And it can regulate activities that have a substantial effect on interstate commerce, even when those activities happen inside a single state.4Justia. United States v. Lopez, 514 U.S. 549 (1995) That third category is the broadest and the reason federal law reaches so far into activity that looks local.
The Commerce Clause also limits what states can do. Even when Congress has passed no legislation on a subject, the Supreme Court has read the clause to bar states from discriminating against or unduly burdening interstate commerce.5Constitution Annotated. Overview of Dormant Commerce Clause A state cannot charge out-of-state trucking companies fees it does not charge its own carriers, and it cannot write licensing rules designed to keep out-of-state carriers off its roads. Courts strike down state laws under this doctrine when the practical effect is economic protectionism, even if the language reads as neutral.
Federal Criminal Jurisdiction and Interstate Movement
Interstate transportation is the jurisdictional hook for a long list of federal criminal statutes. Conduct that would otherwise be a state matter becomes a federal offense once it crosses a state line, and federal penalties tend to be steeper.
Stolen Property and Vehicles
The Dyer Act punishes anyone who knowingly transports a stolen motor vehicle, vessel, or aircraft across state lines with up to 10 years in federal prison.6GovInfo. 18 U.S.C. 2312 – Transportation of Stolen Vehicles A separate statute reaches stolen goods, money, and securities: moving them in interstate commerce with a value of $5,000 or more is punishable by up to 10 years, and the same statute covers using interstate travel to carry out a fraud scheme of that size or transporting forged financial documents between states.7Office of the Law Revision Counsel. 18 U.S.C. 2314 – Transportation of Stolen Goods, Securities, Moneys, Fraudulent State Tax Stamps, or Articles Used in Counterfeiting
Robbery and Extortion
The Hobbs Act makes robbery or extortion that affects interstate commerce a federal crime carrying up to 20 years.8Office of the Law Revision Counsel. 18 U.S.C. 1951 – Interference With Commerce by Threats or Violence The bar for “affecting commerce” is low. Federal prosecutors have argued successfully that robbing a convenience store affects interstate commerce because the store sells goods that traveled across state lines. The statute is also one of the primary tools used to prosecute public corruption at the state and local level.
Sex Trafficking
The Mann Act makes it a federal offense to knowingly transport any person across state lines for prostitution or other criminal sexual activity, punishable by up to 10 years.9Office of the Law Revision Counsel. 18 U.S.C. 2421 – Transportation Generally The interstate movement of the victim is what turns a possible state case into a federal one.
The pattern is consistent across these statutes. Interstate movement, or a connection to interstate commerce, is what pulls the case into federal court. Without it, prosecution stays with state authorities.
Registration Requirements for Interstate Carriers
Once a commercial operation crosses into interstate commerce, a stack of federal registration duties attaches. Getting any of them wrong can put an operation out of service.
USDOT Number
Any company operating a vehicle in interstate commerce that weighs more than 10,001 pounds, carries more than 8 passengers for compensation, or transports certain hazardous materials must obtain a USDOT number from the Federal Motor Carrier Safety Administration.10Federal Motor Carrier Safety Administration. Do I Need a USDOT Number? The number is the unique identifier used in audits, compliance reviews, crash investigations, and inspections.
Unified Carrier Registration
Interstate motor carriers, freight forwarders, brokers, and leasing companies must also register under the Unified Carrier Registration program and pay annual fees keyed to fleet size. For 2026, fees run from $46 for carriers with two or fewer vehicles to $44,836 for carriers with more than 1,000 vehicles.11UCR (Unified Carrier Registration Plan). Fee Brackets UCR applies to private carriers hauling their own property across state lines, not only to for-hire trucking companies. Operations that stay inside a single state are excluded entirely.12UCR (Unified Carrier Registration Plan). Do I Need to Register?
Apportioned Registration
Interstate carriers register their vehicles through the International Registration Plan, a reciprocity agreement among U.S. states and Canadian provinces. Rather than buying a separate plate in every jurisdiction a truck enters, the carrier registers once in its base jurisdiction and pays fees proportional to the distance its fleet travels in each state or province. Each vehicle receives a single plate and cab card valid across all member jurisdictions.13Commonwealth of Pennsylvania. Apportioned Registration Program
Driver Rules That Change at the State Line
Federal driver requirements apply the moment a driver moves into interstate commerce, and they are stricter than most state rules.
Minimum Age
Federal regulations require interstate commercial motor vehicle drivers to be at least 21.14eCFR. 49 CFR 391.11 – General Qualifications of Drivers Many states let 18-year-olds drive commercial vehicles intrastate, which produces the odd result that a driver can legally haul freight all day inside their home state but cannot cross the line. FMCSA is currently running a Safe Driver Apprenticeship Pilot Program that allows qualified 18-to-20-year-old drivers with intrastate CDLs to operate in interstate commerce while accompanied by an experienced driver in the passenger seat.15Federal Motor Carrier Safety Administration. FMCSA Safe Driver Apprenticeship Pilot Program (SDAP)
Hours of Service
Federal hours-of-service limits apply to every interstate commercial driver. For property-carrying drivers, the core rules are:
- No more than 11 hours of driving after 10 consecutive hours off duty.
- All driving must fall within 14 consecutive hours of coming on duty, and off-duty breaks during the day do not extend that window.
- No driving after 60 hours on duty in 7 consecutive days or 70 hours in 8 days, with a 34-consecutive-hour off-duty period resetting the clock.
Passenger-carrying drivers face different numbers: a 10-hour driving maximum after 8 hours off duty and a 15-hour on-duty cap.16Federal Motor Carrier Safety Administration. Summary of Hours of Service Regulations Most interstate commercial vehicles are required to record these hours using electronic logging devices.
What Misclassification Costs
Companies sometimes label interstate operations as intrastate to sidestep federal registration, insurance minimums, and compliance costs. It rarely holds up. FMCSA can place a carrier out of service for operating without proper authority, and the carrier’s insurance may not cover accidents that happened during unregistered interstate operations. A driver injured on an unregistered interstate trip may find the employer’s workers’ compensation defense weaker, since the employer was violating federal law when the crash occurred.
For individual drivers, the consequences are just as concrete. Driving interstate without meeting federal qualifications, or blowing past hours-of-service limits, leads to out-of-service orders, fines, and entries on a driver’s safety record that follow them from one employer to the next. Whether a trip is interstate or intrastate is not paperwork. It decides which rules protect you and which penalties apply when something goes wrong.