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ID-41: Prairie to Lancaster

An expanded highway will help meet the growing traffic demands on this highly-used corridor between Rathdrum and Post Falls.

The railroad overpass will be the first feature to be constructed. Most work will not affect traffic as the new features will be off-alignment.

Railroad overpass

An overpass will be constructed over the railroad tracks between Hayden and Wyoming avenues. Twin bridges each approximately 140 feet long and 55 feet wide will provide 24 feet of clearance over the tracks.

The 12-foot path will continue on both sides of the overpass to provide for future and existing connections. The path on the north side will have illumination, but both will be separated from traffic by concrete barrier.

Although not shown in the drawing, a tunnel on the north end will connect sidewalks on both sides of the bridges.

Intersection changes

Signals will be installed at Wyoming Avenue and Lancaster Road. Both intersections will be redesigned to have dedicated turn lanes in all directions.

The signal at Hayden Avenue will be replaced.


Corridor construction

All work to expand ID-41 is planned for completion in 2022. Expansion will start first with the railroad overpass, with most paving done in 2021 and 2022.

The existing highway will essentially become the southbound lanes of the new highway, allowing much of the work to be constructed with minimal impact.

Once work starts, traffic will continue to run on the current lanes while two new lanes and the railroad overpass are built to the east. Once those lanes are finished, traffic will be moved onto that section while the old section is reconstructed.

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May 2021

First railroad overpass opens

The first of two bridges over the railroad will open May 14. Work on the overpass began in June of 2020 and completing this structure is a major milestone in the effort to expand the highway to four lanes between Post Falls and Rathdrum.

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June 2020

Expansion begins

Over the next three years, new lanes will be added to the east of the existing lanes, along with a wide path for bicyclists and pedestrians.

Expansion begins
Spring 2020

Expansion to take three years

Due to prolonged right of way negotiations, construction of the entire ID-41 corridor has been extended to 2022.


With the onset of snow and winter temperatures in November 2021, most of the work for the season has been completed. Miscellaneous tasks will continue over the winter, including the installment of new signals, which will require nighttime closures that will be communicated via 511 and email updates. Next year is scheduled to be the last season of work.

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ID-41 Prairie to Lancaster: contact us

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