The Visionary Intersections Modernization Act would expand the types of road projects eligible for federal transportation funding by adding roundabout construction to the Surface Transportation Block Grant Program. Currently, this federal program provides flexible funding to states and local communities for various road improvements, but roundabouts are not explicitly listed as eligible projects. This bill would change that by amending federal law to specifically include roundabout construction, making it easier for communities to use federal transportation dollars to build or improve roundabouts at intersections. The legislation affects state departments of transportation and local governments that manage roadways and could benefit communities looking to improve traffic safety and flow. The bill does not specify new funding amounts or implementation timelines, but rather modifies existing program rules to broaden eligible project categories.