“As members of the Ada County Highway District (ACHD) Board of Commissioners, we extend our deepest gratitude to Governor Brad Little, the Idaho Legislature, and the leaders behind the Leading Idaho Local Bridge Program.

The Ada County Highway District serves all who walk, bike, roll, and drive throughout the 5,000+ lane miles within Ada County. We are committed to creating a safe community for residents and team members through our many projects and services.

Disclaimer: The Ada County Highway District documents contained in this system are for information purposes only. To verify the accuracy and currency of this information please contact Ada County Highway District at 208-387-6100.

Roadwork is a necessary part of improving transportation in Ada County. To make it easy to identify where work is taking place, we've developed an updated map of current road projects in Ada County, including ACHD and non-ACHD work called "Roadwork in the Area" or "RITA."

The Ada County Highway District's Traffic Division is responsible for planning, designing and managing efficient traffic flow and traffic safety throughout Ada County. More About Traffic

Ada County Highway District. Roadwork In the Area (RITA) 5 Year-No Cut Road Moratorium. ACHD 2022-2026 Integrated Five Year Work Plan (IFYWP) ACHD Commission Districts. ACHD Maintenance Areas. ACHD Storm Drain Inlets. ACHD TRAFFIC APP. ACHD's Adopt-A-Hwy Program Web App.

The Ada County Highway District (ACHD) is the only countywide highway district in Idaho. Located in Garden City, Idaho, it is a government agency established in 1971 as an independent government entity. [1]

Search and download data available from the Ada County Highway District and view StoryMaps, Web Applications and Maps created for the public.

View all public web applications and maps provided by the Ada County Highway District.

Establish a county wide right-of-way preservation map; Establish an existing and future collector network map