Intermodal Rail Volume Surges 12.6% as Diesel Prices Drive Modal Shift

U.S. intermodal rail volume surged 12.6% year-over-year in week 41, significantly outpacing the prior four-week average of 5.5%, according to the Association of American Railroads. This acceleration is driven by two structural forces: sustained high diesel fuel prices making truck transportation less economical, and constrained truck driver availability limiting trucking capacity. The shift is so pronounced that it is testing last-mile infrastructure, with major carriers like JB Hunt reporting difficulty recruiting enough drayage drivers to move containers between intermodal terminals and final destinations. Beyond intermodal strength, carload volumes also rose 3.5% for the week, with primary metal products leading the charge at approximately 25% growth, reflecting robust steelmaking activity across blast furnace and electric arc mini-mill operations.

Chemicals, agriculture, and motor vehicles all posted solid gains, suggesting broad-based industrial demand extending beyond cyclical recovery. However, primary forest products declined 10%, indicating uneven sectoral performance. For supply chain professionals, this news carries dual implications. On one hand, the modal shift presents an opportunity to reduce per-unit transportation costs for eligible freight.

On the other hand, drayage capacity constraints could offset those savings, and competitive dynamics among Class I railroads (particularly BNSF and CSX pulling intermodal business away from Norfolk Southern) may create service disruption or pricing pressure in the near term. Wall Street expects double-digit earnings growth for most Class I railroads in Q3, signaling that pricing power remains strong despite volume growth.