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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.

Corridor construction schedule
2020 - 2022
Traffic impacts
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I-90 interchange construction starts
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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

Two signals will be installed at Lancaster Road and Nagel Lane. The intersection with Lancaster Road will have dedicated turn lanes in all directions, but the Nagel Lane intersection will not have a dedicated right turn lane.

The signal at Hayden Avenue will be replaced, and components of the Boekel Avenue signal will be upgraded.


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.


download fact sheet
Asset 5
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.


Work is now underway in the corridor. Read more

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ID-41 Prairie to Lancaster: contact us

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