U.S. Intermodal Rail Traffic Extends Double-Digit Growth Streak, Pressuring Operations
WASHINGTON — Surging intermodal traffic once again propelled weekly U.S. rail volumes well above year-ago levels, as the industry enters a period of sustained demand that is testing network fluidity and equipment availability.
For the week ending June 27, 2026, total U.S. rail traffic reached 525,474 carloads and intermodal units, a 7% increase over the same week in 2025, according to data released by the Association of American Railroads (AAR). The strong showing was powered by intermodal units — containers and trailers — which hit 293,066, up 10.1% from a year earlier. Carloads, excluding intermodal, totaled 232,408, up 3.3%.
This marks the sixth consecutive week in which intermodal volume has risen by 10% or more compared with the corresponding week of 2025 — a trend that is beginning to strain rail operations. Rising import flows, shifting supply chain patterns, and increased domestic freight demand are pushing terminals and rail corridors close to capacity, according to industry analysts. Last week, Trains.com reported that escalating intermodal volume is creating operational challenges, including congestion at key intermodal yards and tighter equipment cycles. [See: “Rising intermodal volume …,” Trains.com, June 30, 2026.]
Year-to-date, U.S. rail volumes stand at 12,666,593 carloads and intermodal units, a 3.3% gain over the first 25 weeks of 2025. Within that, carloads total 5,681,611 (up 3.2%) and intermodal units reach 6,984,982 (up 3.3%), underscoring the broader expansion in rail freight demand.
Across North America, weekly volume for the week ending June 27 — as reported by nine U.S., Canadian, and Mexican railroads — reached 719,853 units, up 5% year over year. Carloads rose 2.9% to 339,542, while intermodal units climbed 6.9% to 380,111. On a cumulative basis, North American traffic for 2026 through the first 25 weeks totaled 17,428,272 units, an increase of 2.7% compared with the same period in 2025.
In Canada, railroads reported weekly carloads of 92,850 (up 4%), but intermodal slipped 6.3% to 73,175. Year-to-date volume across Canada stands at 4,117,982 units, up just 0.5%, reflecting a more mixed demand environment north of the border.
Mexican railroads posted 14,284 carloads for the week (down 8.5% from a year ago), but intermodal surged 21.1% to 14,070 units. The cumulative 2026 volume for Mexico is 643,697 units, up 7.8% from the same point last year, driven by nearshoring trends and cross-border trade.
The continued strength in intermodal reflects deeper economic currents: steady consumer spending, inventory rebuilding, and the ongoing shift of freight from truck to rail for longer hauls. However, industry observers caution that without additional capacity investments or operational adjustments, the pressure on infrastructure could begin to curb growth in the second half of the year.
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