This bill would redesignate U.S. Route 287 as Interstate Route I-47, creating a new interstate highway corridor that runs from Port Arthur, Texas to Choteau, Montana. The legislation amends the 1991 Intermodal Surface Transportation Efficiency Act to officially designate this route as a high-priority corridor and grant it interstate status and numbering. The bill was introduced in September 2026 by six Texas and Oklahoma representatives. The legislation does not specify new federal funding amounts or construction timelines, focusing instead on the formal redesignation of the existing U.S. Route 287 as an interstate highway.