Note: Except as indicated, all references in this document are to the Infrastructure Investment and Jobs Act (IIJA), Pub. L. 117-58 (Nov. 15, 2021).

Statutory Citations

• §§ 11101, 11104, 11108; 23 U.S.C. 104, 130; MAP-21 (Pub. L. 112-141) § 1519(a)

Overview

As under the FAST Act, the IIJA authorizes a single, combined amount for each fiscal year for all apportioned highway programs combined. That amount is first apportioned among the States, and then each State’s apportionment is divided among the individual apportioned programs.

The IIJA also appropriates funding from the General Fund for three other formula-based programs separate and apart from the apportioned amount described above (and the formula described below): (1) the Bridge Formula Program, (2) the National Electric Vehicle Infrastructure Formula Program, and (3) the Appalachian Development Highway System Program. (See the “Bridge Formula Program,” “National Electric Vehicle Infrastructure Formula Program,” and “Appalachian Development Highway System” fact sheets for details on each of these programs.)

Total Funding for Federal-aid Highway Apportioned Programs

The IIJA authorizes a total combined amount ($52.5 B for fiscal year (FY) 2022, $53.5 B for FY23, $54.6 B for FY24, $55.7 B for FY25, and $56.8 B for FY26) in Contract Authority from the Highway Account of the Highway Trust Fund to fund 8 highway apportioned programs (including certain set-asides):

• National Highway Performance Program (NHPP);
• Surface Transportation Block Grant Program (STBG);
• Highway Safety Improvement Program (HSIP);
• Congestion Mitigation and Air Quality Improvement Program (CMAQ);
• National Highway Freight Program (NHFP);
• Metropolitan Planning (PL);
• Carbon Reduction Program (CRP) [NEW]; and
• Promoting Resilient Operations for Transformative, Efficient, and Cost-saving Transportation (PROTECT) Formula Program [NEW].

Determination of Each State’s apportionment

Calculation of a State’s Initial Apportionment

For FY22 and each fiscal year thereafter, FHWA determines a State’s initial apportionment, calculating for the State a share of the national total equal to the State’s share of FY21 apportionments. For example, the initial FY22 apportionment amount for a State that received 2% of FY21 apportionments would be $1.05 B (2% of the $52.5 B national total for FY22). [23 U.S.C. 104(c)(1)(A)]

Adjustments Based on Trust Fund Contributions and Prior Year Apportionments

FHWA then adjusts that initial apportionment amount, if necessary, to ensure that each State’s total apportionment for the fiscal year satisfies the following conditions: [23 U.S.C. 104(c)(1)(B)]

• 95 cents-on-the-dollar: Each State’s apportionment must equal at least 95% of the dollar amount of the State’s contributions to the Highway Account of the Highway Trust Fund in the most recent fiscal year for which data are available (considering only taxes in effect on July 1, 2019, and only up to the rates of those taxes in effect on that date).

• Minimum increases from previous year and FY21: Each State’s apportionment must be at least—

  • 1% greater than the State’s total apportionment for the previous fiscal year; and
  • 2% greater than the State’s total FY21 apportionment.

Division of a State’s Apportionment Among Programs

After determining the State’s total apportionment, FHWA divides that amount among the State’s individual formula programs in the manner described below.