Ada County Highway District

Cassia Street Bikeway & Sidewalk Projects


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Construction Update as of 4/22/2021: Suez completed their utility relocations on April 6th. Asphalt paving expected to follow.

The pedestrian bridge in Cassia Park is complete.  Sidewalk and fence are being installed at Cassia Park. There is ongoing signal work on at Orchard/Cassia Street. Excavation starts on April 19th on east Orchard.

Roadwork on Cassia Street in front of the schools is expected to start in June. 

Previous Construction Updates:

Suez is installing a new water main along Cassia Street in coordination with ACHD's project. Here is an update on their work: 

  • Cassia Street from Owyhee to Shoshone will be closed from March 3rd to March 31st.
  • The intersection of Cassia Street and Shoshone closed March 15th. 

Suez closed the intersection of Cassia Street and Owyhee Street January 15th. They also closed Cassia Street, Latah Street to Owyhee Street in early January for work on a new water main.

Construction begins January 4th. Suez will begin work on installing a main line on Cassia Street starting at Latah Street and heading east to Shoshone Street. ACHD's contractor will begin irrigation work on Cassia Street from Latah Street to Shoshone Street and work in Cassia Park. Other utility work will be ongoing throughout construction.

About the project:

The Ada County Highway District (ACHD) will begin construction on the Cassia Street Bikeway & Sidewalk projects in January. Construction is anticipated to be complete in late summer 2021.

The projects include bike lanes, signalized pedestrian/bicycle crossings, a new pedestrian bridge at Cassia Park, a raised intersection, and more. In addition to the bikeway, sidewalks will be built on Cassia between Shoshone and Latah, and Cassia between Troxel and Franklin Park where they currently don't exist. Check out the project overview map here. 

During construction you can expect...

  • Lane restrictions and short-term closures
  • Temporary pedestrian detours
  • Equipment back up alarms and ground vibration
  • General construction noise, and dust
  • Temporary on-street parking impacts.
  • Utility work will include, but not be limited to, Suez installing a new water main on Cassia, between Latah and Shoshone.

The contractor will coordinate with property owners to maintain access during construction and crews will work between 7 a.m. to 7 p.m., unless otherwise approved.


  • Winter - work on irrigation canal and facilities; utility work
  • Spring/Summer - Sidewalk and pedestrian signal installation; roadway paving


Summer 2020 Update 

Thank you to all that attended the January 2020 open house. If you are interested in what we heard from attendees, please check out the comment summary here.

We are currently finalizing design of the project and are scheduled to begin construction around January 2021. The construction effort that will take place over the winter will primarily consist of any work involving irrigation canals and facilities. Construction activities such as sidewalk installation, pedestrian signal installation, and roadway paving will take place in the spring/summer 2021. We will be providing additional updates as we get closer to construction.


 We always value your comments, but the comment period ended on January 23, 2020.

Join us to learn about bike and pedestrian improvements for Cassia Street!

The Ada County Highway District (ACHD) has been working with the community to develop a bikeway design for Cassia St. from Kootenai St. to Franklin Rd. since 2018.

The design includes bike lanes, signalized pedestrian/bicycle crossings, a new pedestrian bridge at Cassia Park, a raised intersection, and more.

In addition to the bikeway, sidewalks are being designed for Cassia Street, between Latah and Shoshone, and Cassia between Troxel and Franklin Park where they currently don't exist.

*The proposed bikeway includes streets beyond Cassia Street. Please check the route map to see which streets are included in the bikeway.*


Cassia and Shoshone Streets Bikeway Projects adopted by ACHD Commission

The Cassia & Shoshone Bikeway Projects were adopted by the ACHD Commissioners on Wednesday, October 24, 2018.


Materials from the June 13, 2018 open houses

If you missed our outdoor meetings on June 13, 2018 please review the information and let us know what you think!

General Description:
The Ada County Highway District (ACHD) is beginning the design of the Cassia Street Bikeway. The goal of the project is to prepare a concept design for a bikeway that will be comfortable for people of a wide range of ages and abilities to bike on.

*Please note that the proposed bikeways include streets beyond Cassia Street. Please check the proposed route maps to see which streets may be included in each bikeway.

What is a bikeway?

A bikeway is a route, way, or path that is specifically designed and/or designated for bicycle travel. A bikeway does not preclude vehicular travel, but enhances the roadway character and experience for cyclists.

Why Cassia Street?

Cassia Street was identified as a potential bikeway in the 2012 Boise Central Bench Neighborhood Pedestrian and Bicycle Plan. It's also included in the 2018 Roadways to Bikeways Bicycle Master Plan Update.

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