Ada County Highway District

Broadway/ Warm Springs/ Avenue B Intersection Concept

General Description:

While the intersection project design is not anticipated to begin for several years, ACHD is pleased to announce that we have moved forward with the multi-use pathway and expect to begin construction on the pathway at the end of May 2019. Construction is anticipated to be complete at the end of August 2019. Learn more...


On Wednesday, June 15th, the Ada County Highway District Commission voted to select Alternative D as the preferred concept for the Broadway/Warm Springs/Ave B intersection. However, in order to minimize the impact to businesses recovering from the closure of the Broadway Bridge, and in order to coordinate with other proposed construction projects in the area, the Commission also directed staff to delay the design of the project for several years. Funding years for design, right-of-way, and construction phases will be identified during future updates of the Integrated Five Year Work Plan. In summary, construction of this concept will provide bike lanes on Broadway Ave, Avenue B, and Warm Springs. It will also provide a multi-use pathway connecting Broadway Ave to Warm Springs Ave through the Dona Larsen Park. Two pedestrian signals will be installed to improve safety for those crossing Broadway Ave and Avenue B. Finally, improvements will be made at the intersection to provide more pedestrian space and improve traffic signal operations.

Schedule Change Please see information below regarding the change in timing regarding the Broadway/Warm Springs/Avenue B Intersection Concept.

  • May 25 - 4:30 p.m. Work Session
    • At a work session the ACHD Commission will review public input received on the Broadway/Warm Springs/Avenue B Intersection Concept.
  • June 15 - 6 p.m. Commission Meeting
    • The intersection Concept will be presented to the ACHD Commissioners for a decision on Wednesday, June 15, 2016. The meeting will begin at 6 p.m.; however, this project is one of several agenda items and may not be the first item discussed. ACHD staff will make a brief presentation followed by an opportunity for public comment before the Commission acts.
    • View the staff report under "Related Documents" to the right of your screen.

  Materials from March 31, 2016 Open House
Materials from the March 31, 2016 open house can be found under "Related Documents" to the right of your screen.  Materials from October 29, 2015 Open House

The Broadway/ Warm Springs/ Avenue B intersection is a busy intersection, linking several neighborhoods to Downtown Boise and is the gateway to St. Luke's Regional Medical Center. In addition, Warm Springs Avenue provides access to Lucky Peak and other recreational opportunities.
ACHD and the City of Boise have begun a study to evaluate alternatives to address the safety and congestion of this intersection.  The study will result in recommended improvements to better serve the needs of everyone who uses the intersection. 
The study is anticipated to be complete by Summer 2016. At that time, a preferred configuration, based on input from the community, will be identified, and a concept design will be completed.
The improvements will allow the intersection to safely accommodate present and future traffic volumes, and all users, including bicyclists, pedestrians and persons with disabilities.

Time Frame

Start Date:
Fall 2015
End Date:
Summer 2016

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