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Logistics and customs · · 9 min read

How cross-border trucking works between Mexico and the U.S.

The three legs of a northbound truck shipment, who moves the trailer across the bridge, the documents on each side, why carrier liability in Mexico is low, and how to choose a carrier and a crossing.

Photo: Bernd Dittrich / Unsplash

Most of the goods traded between Mexico and the United States cross the border by truck. The Port of Laredo alone handled about $354 billion in trade in 2025, the most of any U.S. land port. Yet a cross-border truck shipment isn't one truck making one trip. It's usually three legs, two customs declarations, and a handoff at the bridge.

This guide walks through a typical northbound shipment, from a Mexican factory to a U.S. buyer. It's an overview, not legal advice; your carrier and customs brokers should confirm the details for your freight.

The three legs

  1. The Mexican leg. A Mexican carrier picks up the trailer at the factory and hauls it to a border city, often to a yard near the crossing.
  2. The crossing. A short-haul carrier, called a transfer or drayage carrier, takes the trailer across the bridge, through Mexican export customs and U.S. import inspection, to a yard on the U.S. side.
  3. The U.S. leg. A U.S. carrier hooks the trailer and delivers it to your door.

Why the handoff? Operating rights. Mexico-domiciled carriers need U.S. operating authority from the Federal Motor Carrier Safety Administration (FMCSA) to drive in the United States: one kind of authority covers only the border commercial zones, and a separate one covers long-haul trips beyond them. Most Mexican carriers stay on their side, and U.S. carriers generally don't move freight within Mexico. Transfer carriers bridge the gap. Some carriers and freight forwarders offer through service, moving the same trailer end to end by arranging all three legs, or with equipment that is authorized on both sides.

What happens at the border

Northbound, a typical crossing looks like this:

  1. Before the truck arrives, your supplier's Mexican customs broker files the export declaration (pedimento), and your U.S. customs broker prepares the import entry.
  2. An electronic manifest goes to CBP (the ACE e-Manifest), declaring the truck, trailer, driver, and shipments. For trucks it's generally due at least an hour before arrival at the port.
  3. The truck clears Mexican export customs. The driver presents the documents at the Mexican checkpoint, and the shipment may be selected for inspection in the export lot.
  4. The truck crosses and is processed by CBP, with possible inspection at the U.S. federal compound.
  5. A state safety inspection may follow, for example by Texas troopers at the state inspection facility.
  6. The trailer goes to a yard on the U.S. side, where the U.S. carrier picks it up.

Delays usually come from paperwork that doesn't match: a commercial invoice that disagrees with the pedimento or the U.S. entry, a missing document, or an entry filed late. Most of them are avoidable.

The truck's paperwork

The trade documents (commercial invoice, packing list, the export pedimento, the U.S. entry, a certification of origin for USMCA treatment) are covered in How to import manufactured goods from Mexico. Two more belong to the truck itself:

  • The Carta Porte, an electronic invoice (CFDI) with a transport complement that Mexico's tax authority requires for moving goods on federal highways inside Mexico. It carries the carrier's federal permit and insurance details, so the carrier issues it.
  • The ACE e-Manifest, filed with CBP before the truck reaches the port, declaring the truck, trailer, driver, and shipments.

Faster lanes: CTPAT, OEA, and FAST

The FAST lanes at the main crossings are reserved for low-risk shipments. To use them, every link in the chain has to be in a trusted-trader program: the importer, the carrier, and the manufacturer in CBP's CTPAT or Mexico's counterpart, the Authorized Economic Operator (OEA) program, and a driver with a FAST card. If your freight crosses often, ask carriers whether they're certified and whether their drivers carry FAST cards.

Insure the cargo

Under Mexico's federal road transport law, if you don't declare the value of the goods or agree otherwise, a carrier's liability for loss or damage is limited to the equivalent of 15 days of minimum wage per ton of cargo. For a trailer of manufactured goods, that's usually a small fraction of their value. Declare the value, agree on liability in the contract, and buy cargo insurance that covers the whole route, including the crossing.

Cargo theft is also a real risk on some Mexican highways. Ask carriers about GPS tracking, security protocols, and the routes and stops they use.

Which crossing?

Pick the crossing that matches your route, not the one that's closest on a map:

  • Laredo–Nuevo Laredo for freight between central or northeastern Mexico (the Bajío, Monterrey) and Texas, the Midwest, or the East Coast. It's the busiest land port in the U.S., with more customs brokers than any other Mexican city and hundreds of carriers on both sides.
  • Tijuana–Otay Mesa for Baja California and Southern California.
  • Ciudad Juárez–El Paso for Chihuahua's manufacturing base.
  • Reynosa–Pharr and Matamoros–Brownsville for the Rio Grande Valley.
  • Nogales for Sonora, Arizona, and the western U.S.

Choosing a carrier

  • Permits and authority. A Mexican carrier needs a federal permit from Mexico's transport ministry (SICT). A carrier that drives into the U.S. needs FMCSA authority.
  • Insurance and liability. Ask what the policy covers, and agree on a declared value.
  • Equipment. Dry vans, flatbeds, refrigerated trailers, and hazmat-certified units are different fleets.
  • Who moves the trailer across. Their own transfer operation, or a partner?
  • Certifications. CTPAT, OEA, and FAST, if speed at the border matters to you.
  • Tracking and security. GPS, check calls, and what happens if a load goes off route.

If you'd rather not coordinate three carriers and two brokers yourself, a freight forwarder arranges the whole move and gives you one point of contact.

Find carriers and forwarders

Our directory lists Mexico's freight carriers, forwarders, and rail, ocean, and parcel companies, by service and city. For cross-border freight, start with the border cities, for example logistics companies in Nuevo Laredo, or with freight forwarders.

Agalma doesn't arrange or broker freight. You hire and pay the carrier or forwarder directly; we help you find them.

Sources

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