Rail Freight Surges 7% as Intermodal Volumes Power Growth

U.S. rail freight markets are showing broad-based strength, with intermodal volumes accelerating at nearly 7% growth week-over-week and total combined rail traffic (carloads plus intermodal) climbing 4.9% year-over-year for the week ending September 19. This momentum is being driven by strong demand across metals, petroleum, and construction materials, categories posting double-digit gains, while traditional commodities like grain and coal face seasonal headwinds. The data reveals an important bifurcation in the rail market: containerized and trailerized shipments are significantly outpacing traditional carload freight, suggesting a structural shift toward higher-value, time-sensitive goods and e-commerce-driven logistics networks.

Year-to-date volumes through 37 weeks show intermodal units up 4.1% versus carloads up just 2.7%, reinforcing this trend. For supply chain professionals, this signals robust demand for asset-light, flexible shipping solutions and underscores the strategic importance of intermodal capacity as shippers seek to balance cost, speed, and reliability. However, the moderation in grain shipments (down 7.7%) and persistent weakness in automotive (down 0.8%) warrant monitoring, particularly as these sectors face their own demand pressures and inventory normalization cycles.

The North American cross-border rail activity, combining U.S., Canadian, and Mexican traffic, remains solidly positive at 4.6% growth, suggesting regional supply chains are resilient despite earlier concerns about economic softness.