Projects

US-20 Idaho Falls to Rigby

US-20 from Idaho Falls to Rigby will be resurfaced to ensure the longevity of this vital roadway.

US-20 Idaho Falls to Rigby

US-20 from Idaho Falls to Rigby will be resurfaced to ensure the longevity of this vital roadway.

SMART PLANNING WITH TRAFFIC IN MIND

This eastern Idaho section of US-20 serves an annual average of more than 30,000 cars each day, even as many as 44,000 a day during peak seasons! Because we understand the vital importance of this route, construction of this project will be completed during NIGHT hours only. Both lanes of US-20 from Idaho Falls to Rigby will be OPEN from 6 a.m. to 7 p.m. daily.

Overview

Construction of this project is scheduled to begin early this summer of 2026. The project will resurface U.S. Highway 20 from milepost 310 (Lewisville Exit) to milepost 320 (Rigby Exit), including all exit ramps and the roadway under each interchange. The top layer of asphalt will be 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 in the Ucon area between Idaho Falls and Rigby

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 30,000 vehicles per day! Because we know this is such an important lifeline route for eastern Idaho, the contract has specified that all construction work will be conducted during nighttime hours, starting at 7 p.m. and concluding by 6 a.m.

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

There is expected to be some ramp closures at the US-20 Exits within the project area- Lewisville, St. Leon, Hitt Road, Ucon, County Line and South Rigby. Timing of closures will be shared in advance here to the degree possible. Detours at the next exit will be available, with only one ramp at a time being closed.

Timeline

  • Early Summer 2026

    Construction work begins.

  • Late Summer 2026

    Work completed within 50 working days.

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