State Street and Pierce Park Lane Intersection

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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
  • March 20, 2025

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    20 Mar 2025
    • Utility relocation work is on-going.
    • Irrigation work is nearly complete.
    • 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.
  • March 14, 2025

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    14 Mar 2025
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going. Irrigation work is on-going.
    • Traffic calming plan was implemented in the neighborhoods north of State Street beginning the week of March 10th.
    • Traffic will be shifted to the south as early as March 19th (eastbound) & March 20th (westbound). Work will be done at night.
  • March 11, 2025 - Traffic Shift Information & Map

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    11 Mar 2025

    The State Street & Pierce Park project moves into the next phase of construction next week.

    • Traffic will be shifted to the south to allow the contractor to rebuild the north side of State Street and the west side of Pierce Park.
    • On the night of March 19th, eastbound traffic will be shifted to the south. On the night of March 20th, westbound traffic will be shifted to the south.
      • Work includes re-striping the roadway and adjusting the signal at State Street and Pierce Park.
      • Work hours are from 8pm to 6am and drivers should expect delays.
    • After traffic is shifted, there will be two lanes of traffic in each direction on State Street during peak hours and non-working hours (non-working hours are nights and weekends). Single lane closures are allowed on State Street during the daytime, during non-peak hours.
    • Left turns will be eliminated through the work zone. The left-turn lane from eastbound State Street onto Pierce Park will be eliminated during construction.
    • Pierce Park will have one lane in each direction. There are currently two southbound lanes, one for turning right onto westbound State Street and one for turning left onto eastbound State Street. During construction, there will be one southbound lane from which drivers can turn either left or right.
    • The speed limit will be reduced to 30 MPH through the work zone.
    • Pedestrian access will remain open through the work zone.
    • Business access will remain open for all businesses in the work zone.
    • Construction work is weather dependent.


  • March 6, 2025

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    06 Mar 2025
    • Work began January 20th.
    • Contractor is removing trees, fences, and other obstructions.
    • Utility relocation work is on-going.
    • Irrigation work is on-going.
    • Traffic calming plan will be implemented in the neighborhoods north of State Street beginning the week of March 10th.
    • Traffic will be shifted to the south as early as March 19th & 20th.
  • February 28, 2025

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    28 Feb 2025
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
    • Irrigation work is on-going.
    • Traffic calming plan will be implemented in the neighborhoods north of State Street beginning the week of March 10th.
    • Traffic will be shifted to the south as early as March 19th & 20th.
  • February 20, 2025

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    20 Feb 2025
    • Work began January 20th. Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
    • Irrigation work is on-going.
    • Traffic calming plan will be implemented in the neighborhoods north of State Street beginning the week of March 10th.
    • Traffic will be shifted to the south as early as March 20th.
  • February 14, 2025

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    14 Feb 2025
    • Pre-construction conference was held December 17th.
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
    • Irrigation work will start the week of February 17th.
  • February 7, 2025

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    07 Feb 2025
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
    • Irrigation work will start the week of February 10th.
  • January 31, 2025

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    31 Jan 2025
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
  • January 23, 2025

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    23 Jan 2025
    • Work began January 20th.
    • Contractor is removing trees, fence, and other obstructions.
    • Utility relocation work is on-going.
Page last updated: 20 Mar 2025, 03:40 PM