Rail Steals Share: Why Trucking Volumes Are Down Despite Strong Demand

Contrary to recent broker concerns, the apparent slowdown in trucking volumes reflects a significant **modal shift to intermodal rail** rather than weakening economic demand. 3% year-over-year, but this masks the reality: domestic intermodal container volumes are surging 10% during the same period, while long-haul truck volumes remain essentially flat. The shift is being driven by two powerful, reinforcing factors: a **34% cost advantage** that rail currently holds over trucking, and the absence of time pressure on freight flows as retailers rebuild inventories after months of tight stock levels. This structural change in shipper behavior carries significant operational and strategic implications for transportation companies and supply chain planners.

With ports recording strong import volumes and retailers pre-positioning inventory for the second half of the year, companies have a multi-month window before product must reach store shelves—making slower but substantially cheaper rail an attractive option. Fuel economics are amplifying this spread; when fuel prices rise, intermodal surcharges increase at a slower rate than trucking surcharges, widening the already substantial cost gap. The lag between fuel price increases (March) and traffic response (June) reveals how supply chain reconfigurations take time to execute operationally. However, this modal advantage is expected to erode as the calendar shifts into October and November.

Fourth-quarter restocking and holiday demand typically inject time pressure back into the market, pushing shippers toward faster trucking capacity. The critical wildcard is that freight is already traveling slower through the country's interior distribution networks on rail—meaning the customary late-year surge in trucking demand may arrive more muted than historical seasonal patterns suggest. Supply chain professionals should anticipate uneven demand recovery and prepare capacity and pricing strategies accordingly.