Ada County Highway District
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  Project Information

Going to the public earlier in the potential project process creates opportunities for residents to learn about and weigh in on current and future roadway projects. ACHD believes this will help build safer, smarter and more efficient roadways.

Projects and Open Houses

  All About Traffic

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


This team is responsible for maintaining more than 5,170 lane miles of roadway and more than 810 bridges and large culverts within the ACHD's jurisdiction.

More About Maintenance

ACHD News Blog

ACHD rolls out new school flashers
The Ada County Highway District is rolling out new school zone flashers throughout the county. So far, 51 school flashers have...

ACHD welcomes two new Commissioners
The Ada County Highway District is excited to welcome its two newest members of the Commission. Representing the District 2 is Commissioner Alexis Pickering who...

ACHD honored for excellence in construction partnering
The Ada County Highway District proudly announces ACHD Commission President Mary May has been chosen to receive a 2020 Community...

President May honored with COMPASS Leadership in Motion Award
The Ada County Highway District is being honored by the Idaho Transportation Department (ITD) and the Idaho Associated General Contractors (AGC) for excellence in construction partnering. ACHD, along with ITD...

Archived News Releases

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We Drive Quality Transportation For All Ada County ~

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