This bill establishes a new grant program, administered by the Secretary of Transportation, to fund surface transportation infrastructure projects that improve connectivity to public airports. Eligible projects must be located on or within five miles of a public airport and aim to reduce congestion, expand capacity, provide access to under-connected areas, or rehabilitate existing roadway, rail, or transit infrastructure, including bridges and tunnels. States, Indian Tribes, and local governments, including public agencies controlling airports, are eligible to apply for these grants. The program mandates that at least 50 percent of the funds be allocated to projects connecting to large hub airports and at least 30 percent to projects connecting to medium hub airports . The federal share of project costs will follow existing highway funding rules, with non-federal contributions potentially including TIFIA credit assistance and passenger facility charges. The bill authorizes an appropriation of $1 billion annually from the Highway Trust Fund for fiscal years 2027 through 2031 to support these critical infrastructure improvements.