STB Review Begins for $85 Billion Union Pacific-Norfolk Southern Merger to Create First Transcontinental Freight Railroad

The Surface Transportation Board (STB) has officially initiated its formal review of the proposed $85 billion merger between Union Pacific and Norfolk Southern, a landmark transaction that would create the first single-line transcontinental freight railroad in United States history. The regulatory clock is now ticking on a deal that promises to reshape the North American supply chain, with a final decision expected in mid-2027.[1][6]

The STB's review process began after the two Class I railroads submitted a massive tranche of supplemental information in late July 2026, responding to the agency's earlier demands for more granular data on market impacts. To address regulatory skepticism, Union Pacific and Norfolk Southern unveiled a suite of binding customer protections, including expanded Committed Gateway Pricing (CGP) and guarantees to preserve rail options for shippers who currently have access to multiple carriers.[1][4]

For the merging railroads, the value proposition rests on eliminating the structural inefficiencies of the current U.S. rail network. By combining Union Pacific's expansive western footprint with Norfolk Southern's dense eastern network, the new entity—dubbed The Union Pacific Transcontinental Railroad—would operate 50,000 route miles across 43 states. Proponents argue this seamless, single-line service will bypass congested mid-continent interchanges like Chicago, reducing transit times, lowering carbon emissions, and allowing rail to compete more aggressively with long-haul trucking.[1][6]

However, the sheer scale of the $250 billion combined enterprise has galvanized a formidable opposition bloc. The "Stop the Rail Merger Coalition" unites rival railroads, including BNSF and CPKC, with major shipping groups like the American Chemistry Council and the American Farm Bureau Federation. This alliance argues that the merger will inevitably reduce competition, restrict access for captive shippers, and inject new vulnerabilities into the national supply chain.[2][5]

The opposition extends beyond industry stakeholders. A coalition of seven Republican state attorneys general recently filed a letter urging the STB to reject the merger outright. They contend that the railroads' proposed pricing remedies, such as the CGP arrangement, would preserve only a narrow slice of existing competitive options and could perversely incentivize higher rates on the traffic lanes used to calculate benchmark prices.[4]

The merger's impact on the rail workforce has also become a central flashpoint. While Union Pacific and Norfolk Southern have made an unprecedented pledge that every union employee working at the time of the merger will have a job for life, critics point to preliminary analyses projecting over 1,000 layoffs and 500 transfers as operations consolidate. Some labor groups have defended the legally binding labor protections, while others warn of long-term workforce destabilization.[1][3]

Unlike most corporate mergers, which are evaluated by the Department of Justice or the Federal Trade Commission under standard antitrust laws, rail mergers fall under the exclusive jurisdiction of the STB. Under rules adopted in 2001, the STB requires applicants to demonstrate that a major merger not only preserves but actively enhances competition and serves the public interest—a high bar that no transcontinental merger has attempted to clear in a quarter-century.[3][6]

As the STB wades through the thousands of pages of economic modeling, public comments, and competitive analyses, the freight rail industry remains in a state of suspended animation. The board's ultimate ruling will dictate whether the U.S. rail network undergoes its most significant consolidation in decades, or whether the current regional balance of power remains the permanent architecture of American freight.[3][6]