Proposed Union Pacific-Norfolk Southern Merger Faces Scrutiny Amidst CPKC Precedent

United States, March 2026 — The U.S. rail industry is under intense scrutiny as regulators assess the proposed merger between Union Pacific (UP) and Norfolk Southern (NS). This potential consolidation, which would be the largest in U.S. history, is being evaluated against the backdrop of the 2023 merger of Canadian Pacific (CP) and Kansas City Southern (KCS), offering critical insights into the promises and realities of large-scale rail combinations.

The CPKC merger was presented with promises of significant efficiency gains, increased truck-to-rail conversion, and job creation. However, outcomes have fallen short, with only a quarter of the projected truckloads shifting to rail and fewer jobs than initially forecast. This performance raises questions about the efficacy of such large-scale consolidations in achieving stated public benefits and improving modal share against trucking.

Executives at Union Pacific and Norfolk Southern are advocating for their merger by echoing similar arguments of eliminating costly interchanges and creating longer, more efficient single-line routes, projecting the conversion of over two million truckloads annually. Critics, however, argue these projections are based on flawed assumptions and historical growth rates that modern freight railroads have not achieved, pointing to the CPKC merger's modest results as a cautionary tale.

The ongoing debate also highlights the impact of operational philosophies like Precision-Scheduled Railroading (PSR), which has prioritized cost-cutting through service reductions, facility closures, and workforce downsizing. This approach, enabled by deregulation, has led to increased shipping prices and a decline in service quality, potentially driving traffic away from rail and impacting industrial location decisions.

As regulators weigh the UP-NS proposal, the performance of the CPKC merger serves as a crucial benchmark. The industry faces the challenge of demonstrating how a larger consolidation can overcome structural barriers and deliver tangible public benefits, rather than simply replicating past patterns of reduced service and increased costs, which could have far-reaching consequences for supply chains and economic competitiveness.