I–47 Future Interstate Act of 2026
SB 4484, the “I–47 Future Interstate Act of 2026,” would amend federal transportation law to designate the corridor of U.S. Route 287 as a future Interstate highway and assign it the number Interstate 47. The bill adds a new high-priority corridor from State Highway 87 in Port Arthur, Texas, to U.S. Route 89 in Choteau, Montana, and updates the statutory interstate-designation provisions to include that corridor.
In practical terms, the measure does not itself build the highway, but it changes federal law to recognize the route as eligible for interstate designation and numbering. It would affect the Intermodal Surface Transportation Efficiency Act of 1991 by adding a new corridor listing and by amending the section that governs designation and numbering of interstate routes. The bill is primarily a federal transportation and infrastructure designation measure, with implications for state and local planning along the U.S. 287 corridor.
The bill would amend sections 1105(c) and 1105(e)(5) of the Intermodal Surface Transportation Efficiency Act of 1991 to add U.S. Route 287 as a designated high-priority corridor and to formally assign it Interstate Route I–47. This would affect federal transportation policy and could influence future planning, funding priorities, and corridor development decisions for states and localities along the route from Texas through the central and northern Plains to Montana. It does not by itself authorize construction or guarantee interstate conversion, but it creates the statutory basis for the designation.
The available context suggests generally favorable or at least straightforward support for the bill, as it was introduced by Senators Cornyn and Lummis and referred to committee without recorded opposition, amendments, or votes in the provided materials. The bill appears to be a targeted infrastructure designation proposal rather than a controversial policy overhaul. No committee transcript or roll-call vote is available here to indicate broader debate.
No specific points of contention are documented in the provided materials. Potential areas of debate, if the bill advances, could include whether U.S. 287 meets interstate standards, the costs of upgrading the corridor, and how federal and state transportation priorities should be allocated. However, the record supplied does not show any stated opposition, competing viewpoints, or disputed provisions.