Appalachian Development Highway System

The Appalachian Development Highway System (ADHS) is a system of designated corridors and roadways within the 13 States that make up the Appalachian Region. The ADHS Program is aimed at timely completion of the designated ADHS. The ADHS was created by the Appalachian Regional Development Act of 1965. Its purpose was to provide a system of development highways and access roads which would contribute to economic development opportunities in the Appalachian regions of 13 States --Alabama, Georgia, Kentucky, Maryland, Mississippi, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, and West Virginia. The ADHS program is jointly administered by the Appalachian Regional Commission and the FHWA. This Assistance Listing 20.229 created in August 2025 was included in the previous ALN 20.205, please refer to former ALN 20.205 for FY24 and FY25 financial obligations. The new Assistance Listing 20.229 will be utilized by DOT at the start of FY 2026

The ADHS was created by the Appalachian Regional Development Act of 1965. Its purpose was to provide a system of development highways and access roads which would contribute to economic development opportunities in the Appalachian regions of 13 States - Alabama, Georgia, Kentucky, Maryland, Mississippi, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, and West Virginia.