What is intermodal freight?
Intermodal freight uses standardized shipping containers that move seamlessly between trucks, trains, and ships without being unpacked. The ocean container or domestic 53-foot box rides a rail flat-car for the long-haul middle leg, then a drayage truck handles the first and last 50-200 miles to the actual shipper or receiver.
Intermodal is freight in a container, moving across multiple modes of transport using the same box end-to-end. The container — typically a 20-foot or 40-foot ocean box for international freight, or a 53-foot domestic box for North American freight — is loaded once at origin and unloaded once at destination, with all the intermediate handoffs happening at the container level (truck to train, train to truck, train to ship). The economics are simple: rail is roughly 3-5x more fuel-efficient than long-haul trucking per ton-mile, and a single doublestack train can carry 280+ containers — equivalent to 140-280 trucks. That moves a $2.50/mile truckload rate down to roughly $1.25-$1.80/mile equivalent for intermodal on lanes of 500+ miles, with transit times 1-3 days longer than truck. The trade-off is operational complexity: shippers need to book through an Intermodal Marketing Company (IMC) or rail-direct, containers have to be available at origin, drayage carriers handle the truck legs at each end (typically a different company than the rail carrier), and lost or delayed containers can sit at terminals racking up daily per-diem fees. Major US intermodal lanes run between West Coast ports (LA/Long Beach, Oakland, Seattle/Tacoma) and inland hubs (Chicago, Memphis, Dallas, Kansas City), and between Mexican border crossings (Laredo, El Paso) and the same inland hubs. Cross-border intermodal between Mexico and the US grew sharply with nearshoring — 2024 volumes were up roughly 30% year-over-year on most cross-border rail lanes.
- What is drayage in intermodal trucking?Drayage is the short-haul truck movement at either end of an intermodal trip — picking up a container at the port or rail ramp and delivering it to the shipper, or vice versa at the destination. Drayage moves are typically 5-200 miles, priced per move rather than per mile, and run $250-$800 per container depending on distance, fuel, and waiting time at the terminal. Drayage carriers operate fleets of day-cab tractors and container chassis specifically for these short, high-frequency moves.
- What's the difference between intermodal and LTL?Intermodal moves a single shipper's full container across multiple modes; LTL (less-than-truckload) moves several different shippers' smaller shipments together in one trailer using a network of terminals. LTL is for shipments of 150-15,000 lbs that don't fill a trailer. Intermodal is for full-container freight moving long distance. The two networks are entirely separate — different carriers, different rate structures, different SLA expectations.
- How long does intermodal take vs. truck?Add 1-3 days to a truck transit time on most domestic lanes. LA to Chicago is roughly 3 days by truck and 5-6 days by rail intermodal. The difference shrinks on longer hauls — LA to New York is 5 days by truck and 7-8 days by intermodal. Time-sensitive freight (perishables, just-in-time auto parts) stays on trucks; price-sensitive freight (consumer goods, paper, building materials) moves intermodal.