U.S. Rail Traffic Beats 2025: Grain & Chemicals Lead Growth

Rail Freight Momentum Continues, But Hidden Divergences Emerge

U.S. rail freight volumes delivered another positive surprise in early May 2026, with combined carload and intermodal traffic reaching 513,755 units—a solid 3.7% year-over-year increase. On the surface, this headline figure supports the narrative of a recovering freight market. However, beneath the aggregate numbers lie important divergences that supply chain professionals need to understand, particularly the stark performance gap between commodity-dependent carloads and container-based intermodal shipments.

Grain and Chemicals Drive the Gain—But Why?

The real story here is commodity strength, not broad-based freight recovery. Grain shipments, up an impressive 16.7%, are pulling the heaviest weight, followed by chemicals, up 6%. These are not consumer-facing freight categories; they represent industrial input demand and agricultural export activity. Grain strength reflects robust global demand for North American commodities, likely supported by favorable pricing, export competitiveness, and strong demand from key international buyers. Chemical growth, meanwhile, serves as a leading indicator of downstream manufacturing activity—a bellwether for industrial production that typically precedes consumer goods manufacturing.

What this tells us is encouraging but narrow: primary commodity sectors are healthy, but discretionary and retail-adjacent freight remain tepid. This distinction matters because it suggests the rail recovery is not yet broad-based. Intermodal units, which are heavily weighted toward consumer goods, e-commerce, and retail logistics, grew only 0.6% year-to-date despite the headline 3.7% weekly gain. Carloads, by contrast, are up 3.6%—a six-fold difference.

The Intermodal Weakness Warning Signal

The stalled performance of intermodal traffic deserves close attention. At 0.6% year-to-date growth, intermodal is limping along, suggesting that consumer demand, retail inventory replenishment, and e-commerce logistics have not yet rebounded to growth rates seen in commodity freight. This divergence is particularly notable given that intermodal capacity was heavily expanded over the past five years to support e-commerce and retail logistics. Soft growth here could signal either that demand has not recovered, or that shippers have shifted away from rail intermodal in favor of trucking or other modes.

Canadian intermodal traffic adds another layer of concern: down 6.4% for the week, suggesting a potential softness in cross-border e-commerce and north-south trade flows. While year-to-date Canadian traffic remains slightly positive (+0.2%), the weekly decline warrants monitoring as an early warning signal of softening continental trade dynamics.

Mexico, by contrast, showed explosive intermodal growth (+27%), likely reflecting nearshoring activity and manufacturing relocation trends. This geographic divergence suggests that supply chain networks are reshaping, with Mexico gaining at the expense of longer-haul Asia-to-North America flows. For companies managing North American networks, this trend should inform sourcing strategy, facility location decisions, and mode selection.

Strategic Implications for Supply Chain Teams

These data points carry three actionable implications:

First, capacity risk is asymmetric. If grain and chemical volumes continue to surge while intermodal remains soft, rail carriers may see pricing power in commodity lanes but pricing pressure in intermodal. Shippers dependent on rail for agricultural or chemical products should lock in capacity; those reliant on intermodal should explore alternative modes or negotiate aggressively on pricing.

Second, network optimization should account for geographic divergence. Mexican supply chain participation is growing sharply, while Canadian intermodal is weakening. Companies should reassess their North American logistics footprint to ensure they are positioned for nearshoring trends and not overreliant on cross-border Canadian flows.

Third, the 1.9% year-to-date growth rate, while positive, remains fragile. A single disruption—port strikes, rail labor actions, or macroeconomic softness—could easily reverse these gains. Build contingency capacity and maintain supply chain flexibility, particularly for discretionary freight categories where intermodal is the primary rail option.

The rail freight recovery is real but selective. Supply chain leaders should celebrate the commodity strength while remaining cautious about intermodal and consumer-facing logistics, which remain the true test of broad-based demand recovery.

Source: FreightWaves