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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December 4, 2025
Share December 4, 2025 on Facebook Share December 4, 2025 on Twitter Share December 4, 2025 on Linkedin Email December 4, 2025 link- Utility relocation work is complete for the first phase of work.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- The new signal is anticipated to be operational in December or January.
- Concrete for sidewalk, curb, and gutter is complete on the east leg for this phase and on-going at the intersection and on the west leg.
- Asphalt paving is complete on the east side of the project for this phase and on-going at the north leg and on the west leg.
- Concrete paving is complete on the east leg and west leg for this phase, and on-going at the intersection and on the north leg. Work is weather dependent.
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November 20, 2025
Share November 20, 2025 on Facebook Share November 20, 2025 on Twitter Share November 20, 2025 on Linkedin Email November 20, 2025 link- Utility relocation work is complete for the first phase of work.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- The new signal is anticipated to be operational in December or January.
- Concrete for sidewalk, curb, and gutter is complete on the east leg for this phase and on-going at the intersection and on the west leg.
- Asphalt paving is complete on the east side of the project for this phase and on-going at the north leg and on the west leg.
- Concrete paving is complete on the east leg and west leg for this phase, and on-going at the intersection and on the north leg.
- Work is weather dependent.
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November 14, 2025
Share November 14, 2025 on Facebook Share November 14, 2025 on Twitter Share November 14, 2025 on Linkedin Email November 14, 2025 link- Utility relocation work is complete for the first phase of work.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving started on Friday, October 3rd and is on-going.
- Asphalt paving will start as early as Saturday, November 15th, weather dependent.
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November 7, 2025
Share November 7, 2025 on Facebook Share November 7, 2025 on Twitter Share November 7, 2025 on Linkedin Email November 7, 2025 linkUtility relocation work is complete for the first phase of work. Traffic calming plan has been implemented in the neighborhoods north of State Street. Traffic has been shifted to the south so the Contractor can construct the north side of State Street. Left turns have been eliminated through the work zone. Underground electrical work is on-going for street lighting and for the new signal at Pierce Park. Work on stormwater system is complete on the north side. Contractor placing base gravels for sidewalk and roadway. Concrete for sidewalk, curb, and gutter is on-going. Concrete paving started on Friday, October 3rd and is on-going.
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October 31, 2025
Share October 31, 2025 on Facebook Share October 31, 2025 on Twitter Share October 31, 2025 on Linkedin Email October 31, 2025 link- Utility relocation work is complete for the first phase of work.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving started on Friday, October 3rd and is on-going.
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October 24, 2025
Share October 24, 2025 on Facebook Share October 24, 2025 on Twitter Share October 24, 2025 on Linkedin Email October 24, 2025 link- Utility relocation work is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving started on Friday, October 3rd and is on-going.
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October 17, 2025
Share October 17, 2025 on Facebook Share October 17, 2025 on Twitter Share October 17, 2025 on Linkedin Email October 17, 2025 link- Utility relocation work is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- Work on stormwater system is complete on the north side. Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving started on Friday, October 3rd and is on-going.
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October 10, 2025
Share October 10, 2025 on Facebook Share October 10, 2025 on Twitter Share October 10, 2025 on Linkedin Email October 10, 2025 link- Utility relocation work is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going for street lighting and for the new signal at Pierce Park.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving started on Friday, October 3rd and is on-going
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October 2, 2025
Share October 2, 2025 on Facebook Share October 2, 2025 on Twitter Share October 2, 2025 on Linkedin Email October 2, 2025 link- Utility relocation work is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving is anticipated to start on Friday, October 3rd.
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September 26, 2025
Share September 26, 2025 on Facebook Share September 26, 2025 on Twitter Share September 26, 2025 on Linkedin Email September 26, 2025 link- Utility relocation work is on-going.
- Traffic calming plan has been implemented in the neighborhoods north of State Street.
- Traffic has been shifted to the south so the Contractor can construct the north side of State Street.
- Left turns have been eliminated through the work zone.
- Underground electrical work is on-going.
- Work on stormwater system is complete on the north side.
- Contractor placing base gravels for sidewalk and roadway.
- Concrete for sidewalk, curb, and gutter is on-going.
- Concrete paving is anticipated to start on Friday, October 3rd.
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
