A detailed street map showing roads like Amity Rd, Hazel Rd, Columbia Rd, Hubbard Rd, Deer Flat Rd, and Kunad Rd, with color-coded lines representing different types of roads and intersections.

Ada County Highway District’s Master Street Map

What new roads might be coming to your area? The Master Street Map (MSM) is a tool used to identify future new roads that need to be built as development occurs.

Map of a neighborhood with schools, parks, and various landmarks labeled, including Pepper Ridge Elementary, Maple Grove Elementary, Lake Hazel Middle School, and others, with streets and highways marked.

Ada County Highway District’s Neighborhood Plans

Find your neighborhood’s pedestrian and bicycle plan.

A digital map showing a transportation route with colored circles representing stops along the path. The route includes blue, green, orange, purple, and red stops across a suburban area with streets and some parks or green spaces.

Ada County Highway District’s Five Year Plan

View the ACHD’s Five Year road work plan. The most current version runs 2026-2030, but it is updated every year. ACHD is in the process of updating a new 2027-2031 Five Year Plan that will be adopted in September. The future plan is open for comment now.

Pie chart titled 'FY2026 Proposed Revenue' displaying various revenue sources with percentages: Property Taxes 22%, Highway Users Fund 20%, Reserves for Future Facilities 15%, Cash Reserves 13%, Impact Fees 9%, Fees and Services/Other Revenue 4%, State Sales Tax 4%, Cost-Sharing/Federal Grants 6%, Registration Fees 5%, Traffic Fines 1%, CommuterID 1%, Rescheduled Projects 1%.

Ada County Highway District’s Budget

View ACHD’s most recent budget. Here you will find details on revenue and expenses.

Map displaying a grid of colored dots representing data points across a city and surrounding area, with roads and geographic features visible.

LHTAC Interactive Crash Map

Find information on crashes in your area based on location at the Local Highway Technical Assistance Council (LHTAC) Interactive Crash Map.

Multiple cars in a line, stopped at a traffic light on a city street in the evening.

ACHD Traffic Counts

Traffic count information can be found here. ACHD counts traffic on a 24 hour, and AM/PM peak hour time frame. Peak hours are 7-9 am and 4-6 pm.