This bill would redesignate U.S. Route 287, which runs from Port Arthur, Texas, to Choteau, Montana, as Interstate Route I-47. The legislation amends the 1991 Intermodal Surface Transportation Efficiency Act to officially recognize this corridor as a high-priority interstate highway. The bill affects highway infrastructure planning and funding priorities for the federal government and the states of Texas and Montana whose residents and businesses use this major transportation route. While the text provided does not specify separate new funding amounts, designating a route as an interstate typically makes it eligible for federal highway funding and improvements. Senators John Cornyn and Cynthia Lummis introduced the bill in May 2026, and it was referred to the Senate Committee on Environment and Public Works for consideration.
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