State Street and Pierce Park Lane Intersection
The Ada County Highway District (ACHD) is designing future improvements for the State Street and Pierce Park Lane Intersection. This project aims to improve safety and connectivity for all users, accommodate future traffic volumes, and incorporate ideas and concerns gathered from the public.
The improvements for State Street and Pierce Park Lane include:
- Realigning Pierce Park Lane to improve safety and provide better line of sight for drivers
- Widening State Street within the project limits and add medians where necessary for safety
- Providing U-turns at multiple locations
- Adding continuous multi-use pathways for pedestrians and cyclists
- Adding additional crosswalk on State Street
The Ada County Highway District (ACHD) is designing future improvements for the State Street and Pierce Park Lane Intersection. This project aims to improve safety and connectivity for all users, accommodate future traffic volumes, and incorporate ideas and concerns gathered from the public.
The improvements for State Street and Pierce Park Lane include:
- Realigning Pierce Park Lane to improve safety and provide better line of sight for drivers
- Widening State Street within the project limits and add medians where necessary for safety
- Providing U-turns at multiple locations
- Adding continuous multi-use pathways for pedestrians and cyclists
- Adding additional crosswalk on State Street
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July 23, 2026
Share July 23, 2026 on Facebook Share July 23, 2026 on X (formerly Twitter) Share July 23, 2026 on Linkedin Email July 23, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal is complete on the south side of State Street.
- Garden City water line installation is complete and being tested.
- Utility relocation work by Lumen complete.
- Contractor working on stormwater facilities.
- Placement of base gravels is anticipated to start the week of August 3rd.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal is complete on the south side of State Street.
- Garden City water line installation is complete and being tested.
- Utility relocation work by Lumen complete.
- Contractor working on stormwater facilities.
- Placement of base gravels is anticipated to start the week of August 3rd.
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July 17, 2026
Share July 17, 2026 on Facebook Share July 17, 2026 on X (formerly Twitter) Share July 17, 2026 on Linkedin Email July 17, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street. Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st. The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal is comlplete on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street. Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st. The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal is comlplete on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
-
July 9, 2026
Share July 9, 2026 on Facebook Share July 9, 2026 on X (formerly Twitter) Share July 9, 2026 on Linkedin Email July 9, 2026 link- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
-
July 1, 2026
Share July 1, 2026 on Facebook Share July 1, 2026 on X (formerly Twitter) Share July 1, 2026 on Linkedin Email July 1, 2026 link- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
-
June 26, 2026
Share June 26, 2026 on Facebook Share June 26, 2026 on X (formerly Twitter) Share June 26, 2026 on Linkedin Email June 26, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is nearly complete.
- Contractor working on stormwater facilities.
-
June 18, 2026
Share June 18, 2026 on Facebook Share June 18, 2026 on X (formerly Twitter) Share June 18, 2026 on Linkedin Email June 18, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street. Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is on-going.
- Contractor working on stormwater facilities.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street. Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is on-going.
- Contractor working on stormwater facilities.
-
June 12, 2026
Share June 12, 2026 on Facebook Share June 12, 2026 on X (formerly Twitter) Share June 12, 2026 on Linkedin Email June 12, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Westbound traffic is on the north side of State Street.
- Eastbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Garden City water line installation is on-going.
- Utility relocation work by Lumen is on-going.
-
June 5, 2026
Share June 5, 2026 on Facebook Share June 5, 2026 on X (formerly Twitter) Share June 5, 2026 on Linkedin Email June 5, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Eastbound traffic is on the south side of State Street.
- Westbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street. Utility work will follow.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Eastbound traffic is on the south side of State Street.
- Westbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street. Utility work will follow.
-
May 29, 2026
Share May 29, 2026 on Facebook Share May 29, 2026 on X (formerly Twitter) Share May 29, 2026 on Linkedin Email May 29, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Eastbound traffic is on the south side of State Street.
- Westbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Utility work will follow.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Eastbound traffic is on the south side of State Street.
- Westbound traffic was shifted onto the new pavement in the middle of State Street on the night of May 21st.
- The work zone is currently on the south side of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt removal has started on the south side of State Street.
- Utility work will follow.
-
May 21, 2026
Share May 21, 2026 on Facebook Share May 21, 2026 on X (formerly Twitter) Share May 21, 2026 on Linkedin Email May 21, 2026 link- Traffic calming plan has been implemented in the neighborhoods north of State Street
- Eastbound traffic is on the south side of State Street. Westbound traffic was shifted onto the new pavement on the north side of State Street on the night of March 31st. The work zone is currently in the middle of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt and concrete paving for Phase 2 is complete.
- The traffic shift to the 3rd and final phase was implemented on the night of May 21st.
- Traffic calming plan has been implemented in the neighborhoods north of State Street
- Eastbound traffic is on the south side of State Street. Westbound traffic was shifted onto the new pavement on the north side of State Street on the night of March 31st. The work zone is currently in the middle of State Street.
- Left turns have been eliminated through the work zone.
- Work on Pierce Park Lane is mostly complete.
- Asphalt and concrete paving for Phase 2 is complete.
- The traffic shift to the 3rd and final phase was implemented on the night of May 21st.
Key Dates
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December 17 2024
Materials from the Construction Open House
Business Meeting Materials
Project Background
The State Street Corridor has been studied for several years. ACHD and partnering agencies/jurisdictions have evaluated deficiencies along State Street, developed guidelines encouraging transit-supportive land uses, and identified prioritized transit and traffic improvements. The State Street Transit and Traffic Operation Plan served as the basis for the State Street and Pierce Park intersection improvements. In 2017, the ACHD Commission adopted the State Street and Pierce Park Lane Concept Study. ACHD finalized the design in 2019. In 2020, the ACHD Commission voted to delay the project and work on a redesign to shift the project north. In 2021, the project was restarted to incorporate the northern shift.
Timeline
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2017
State Street and Pierce Park Lane Intersection has finished this stageConcept study approval
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2018
State Street and Pierce Park Lane Intersection has finished this stageDesign of recommended alternative
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2019
State Street and Pierce Park Lane Intersection has finished this stageRight-of-way acquisition
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2020
State Street and Pierce Park Lane Intersection has finished this stageACHD Commission postponed project
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2021
State Street and Pierce Park Lane Intersection has finished this stageRevised design
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2022
State Street and Pierce Park Lane Intersection has finished this stageFinalized design of recommended alternative and received public input
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2023
State Street and Pierce Park Lane Intersection has finished this stageAcquired right-of-way
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2025
State Street and Pierce Park Lane Intersection is currently at this stageConstruction
Who's Listening
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Sr. Project Manager
Phone 208-387-6100 Email connect@achdidaho.org -
Supervisor, Construction
Phone 208-387-6100 Email projects@achdidaho.org -
Business & Community Relations Coordinator
Phone 208-387-6100 Email ejohansen@achdidaho.org
