Projects

US-20 Idaho Falls to Rigby

US-20 from Idaho Falls to Rigby is now being resurfaced to ensure the longevity of this vital roadway.

US-20 Idaho Falls to Rigby

US-20 from Idaho Falls to Rigby is now being resurfaced to ensure the longevity of this vital roadway.

WE'RE WORKING THE NIGHT SHIFT

This project is nearing completion, with resurfacing operations now moved from mainline US-20 between Idaho Falls and Rigby to exit ramps and the roads under them. Ramp closures are in effect where work is occurring on one at a time of the six interchanges in this area- Lewisville, St. Leon, Hitt Road, Ucon, County Line and Rigby. Construction is happening from 7 p.m. to 6 a.m. Neighboring exits can be used as a detour overnight when needed. The project is anticipated to be complete by late August.

Overview

Construction of this project began just after Memorial Day 2026. Crews are resurfacing U.S. Highway 20 from milepost 309 (north of Science Center Exit) to milepost 320 (Rigby Exit), including all exit ramps and the roadway under each interchange. The top layer of asphalt is being removed, and then new asphalt applied to provide a continued smooth, safe ride and ensure the longevity of this lifeline route in east Idaho. Engineered and proven pavement preservation like this is what keeps good roads good!

US-20 roadway and on ramp at Lewisville Exit 310 near Idaho Falls, showing green mile marker 310
US-20 roadway near the Hitt Road exit of Idaho Falls

Traffic Impacts

This section of US-20 serves an annual average of more than 35,000 vehicles per day! Because we know this is such an important lifeline route for eastern Idaho, the contract has specified that all construction work be conducted during nighttime hours, starting at 7 p.m. and concluding by 6 a.m.

Sections are being removed and then repaved all within each night shift. This allows both lanes of US-20 to be open during the day. During nighttime working hours, traffic is restricted to one lane in the area construction is specifically being done.

Ramp closures are currently in effect at the US-20 exits within the project area- Lewisville, St. Leon, Hitt Road, Ucon, County Line and Rigby. Closures will occur only where work is actively occurring. Detours at the next exit will be available, with only one closed at a time.

Timeline

  • May 2026

    Construction work begins and is now underway.

  • Late Summer 2026

    Work completed within one and a half months, expected late August.

Contact

Project Manager John Cleveland at (208) 745-5645.