Allumbaugh Street Construction Projects

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The Ada County Highway District (ACHD) is making improvements to Allumbaugh Street, from Franklin Road to Fairmont Street, to improve the roadway for all users.

Improvements will be completed in two separate projects, each with its own construction schedule.

Allumbaugh Street: Franklin Road to Douglas Street

Construction is expected to begin as early as December 2026.

Planned improvements include:

  • Reconstructing the roadway.

  • Adding sidewalks and bike lanes along Allumbaugh Street.

  • Replacing the bridge over the Ridenbaugh Canal.

  • Upgrading pedestrian ramps and driveway entrances to meet current standards.

  • Improving the traffic signals at the Franklin Road intersection.

Allumbaugh Street: Douglas Street to Fairmont Street

Construction is expected to begin as early as spring 2027, following completion of the Franklin Road to Douglas Street section.

Planned improvements include:

  • Reconstructing the roadway.

  • Upgrading pedestrian ramps and driveway entrances to meet current standards.

  • Adding sidewalks where there are currently gaps.

  • Adjusting the existing flashing pedestrian crossing beacon (RRFB).

The Ada County Highway District (ACHD) is making improvements to Allumbaugh Street, from Franklin Road to Fairmont Street, to improve the roadway for all users.

Improvements will be completed in two separate projects, each with its own construction schedule.

Allumbaugh Street: Franklin Road to Douglas Street

Construction is expected to begin as early as December 2026.

Planned improvements include:

  • Reconstructing the roadway.

  • Adding sidewalks and bike lanes along Allumbaugh Street.

  • Replacing the bridge over the Ridenbaugh Canal.

  • Upgrading pedestrian ramps and driveway entrances to meet current standards.

  • Improving the traffic signals at the Franklin Road intersection.

Allumbaugh Street: Douglas Street to Fairmont Street

Construction is expected to begin as early as spring 2027, following completion of the Franklin Road to Douglas Street section.

Planned improvements include:

  • Reconstructing the roadway.

  • Upgrading pedestrian ramps and driveway entrances to meet current standards.

  • Adding sidewalks where there are currently gaps.

  • Adjusting the existing flashing pedestrian crossing beacon (RRFB).

  • Allumbaugh Street Construction to Start Soon

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    In December, the Ada County Highway District (ACHD) will begin construction on Allumbaugh Street between Franklin and Denton. The projects include roadway reconstruction, as well as safety and connectivity improvements for pedestrians and bicyclists. Work is expected to be complete fall 2027.*

    *Construction schedules may change.

    Construction will take place in two separate phases. Work from Franklin Road to Douglas Street is expected to begin as early as December 2026. Work from Douglas Street to Denton Street is expected to begin as early as spring 2027, after the first section is complete.

    Construction Impacts

    • Road closures and detours are expected during construction.
    • Traffic lanes may shift, and flaggers will help direct traffic as work progresses.
    • On-street parking may be limited in construction areas.
    • Expect construction noise, dust, equipment backup alarms and ground vibration.
    • Crews will work from 7 a.m. to 7 p.m. unless otherwise approved.
    • The contractor will work with property owners to minimize impacts and maintain access

    Construction on Allumbaugh Street will begin after Liberty Street is temporarily paved and reopened to two lanes of traffic.


    In December, the Ada County Highway District (ACHD) will begin construction on Allumbaugh Street between Franklin and Denton. The projects include roadway reconstruction, as well as safety and connectivity improvements for pedestrians and bicyclists. Work is expected to be complete fall 2027.*

    *Construction schedules may change.

    Construction will take place in two separate phases. Work from Franklin Road to Douglas Street is expected to begin as early as December 2026. Work from Douglas Street to Denton Street is expected to begin as early as spring 2027, after the first section is complete.

    Construction Impacts

    • Road closures and detours are expected during construction.
    • Traffic lanes may shift, and flaggers will help direct traffic as work progresses.
    • On-street parking may be limited in construction areas.
    • Expect construction noise, dust, equipment backup alarms and ground vibration.
    • Crews will work from 7 a.m. to 7 p.m. unless otherwise approved.
    • The contractor will work with property owners to minimize impacts and maintain access

    Construction on Allumbaugh Street will begin after Liberty Street is temporarily paved and reopened to two lanes of traffic.


Page published: 13 Nov 2026, 09:21 AM