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 13, 2025

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    • 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.
    • Hertford Way is scheduled to be closed the week of Spring Break, March 16th – 22nd for roadway excavation and asphalt paving.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 anticipated to be complete for this phase in mid-March.
    • Concrete paving was completed for this phase on February 12th.
    • The traffic swap to the second phase of the project is anticipated for late March or early April.
    • Work is weather dependent.
  • March 12, 2026 - Hertford Closure - Map & Information

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    Beginning Monday, Hertford Way will be closed between State Street and Trowbridge Street. The closure is necessary for excavation as part of ACHD's State Street and Pierce Park Lane project. Commuters should use Ellen's Ferry Drive as a detour during the closure (see detour map). The road is expected to reopen by Sunday, March 22.


  • March 6, 2026

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    • 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.
    • Hertford Way is scheduled to be closed the week of Spring Break, March 16th – 22nd for roadway excavation and asphalt paving.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 anticipated to be complete for this phase in mid-March.
    • Concrete paving was completed for this phase on February 12th.
    • The traffic swap to the second phase of the project is anticipated for late March or early April.
    • Work is weather dependent.
  • February 27, 2026

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    • 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.
    • Hertford Way is scheduled to be closed the week of Spring Break, March 16th – 22nd for roadway excavation and asphalt paving.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 anticipated to be complete for this phase in mid-March.
    • Concrete paving was completed for this phase on February 12th.
    • The traffic swap to the second phase of the project is anticipated for late March or early April.
    • Work is weather dependent.
  • February 19, 2026

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    • 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.
    • The new signal at Pierce Park was activated the night of January 14th.
    • Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 anticipated to be complete for this phase in mid-March.
    • Concrete paving was completed for this phase on February 12th.
    • The traffic swap to the second phase of the project is anticipated for late March or early April.
    • Work is weather dependent.
  • February 12, 2026

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    • 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.
    • The new signal at Pierce Park was activated the night of January 14th. Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 anticipated to be complete for this phase in mid-March.
    • Concrete paving was completed for this phase on February 12th.
    • The traffic swap to the second phase of the project is anticipated for late March or early April.
    • Work is weather dependent.
  • February 5, 2026

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    • 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 at Pierce Park was activated the night of January 14th. Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 and north legs of the intersection for this phase and on-going on the west leg.
    • Concrete paving is anticipated to be completed by February 13th. Work is weather dependent.
  • January 30, 2026

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    • 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 at Pierce Park was activated the night of January 14th. Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 and north legs of the intersection for this phase and on-going 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.
  • January 23, 2026

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    • 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 at Pierce Park was activated the night of January 14th. Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • Contractor excavating for curb, gutter, sidewalk, and roadway on the east side of Pierce Park.
    • 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 and north legs of the intersection for this phase and on-going 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.
  • January 16, 2026

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    • 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 at Pierce Park was activated the night of January 14th. Traffic on Pierce Park has been shifted onto the new concrete pavement on the west side of Pierce Park.
    • 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 and north legs of the intersection for this phase and on-going 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.
Page last updated: 13 Mar 2026, 01:33 PM