New I-84 Lanes Open Near the Twin Falls Interchange as Widening Wraps Up

TWIN FALLS — Drivers heading to and from Twin Falls, Idaho, are about to get new lanes on Interstate 84. The Idaho Transportation Department (ITD) plans to shift traffic near the Twin Falls Interchange (Exit 173) on Friday and Saturday nights, Nov. 13-14, and then open I-84 in its final configuration, ITD announced Nov. 9, 2026.

When the shift is done, I-84 will have three lanes in each direction west of the Twin Falls Interchange and two lanes in each direction east of it.

The I-84 Jerome to Twin Falls widening

The new lanes are part of ITD's I-84 Jerome to Twin Falls project, which began in 2023 to improve safety and capacity by widening I-84 to three lanes in each direction between the South Jerome Interchange and the Twin Falls Interchange. The work also replaces the roadway with a new concrete surface and rebuilds the 400 South Road bridges. The project is funded through ITD's Leading Idaho Transportation Expansion and Congestion Mitigation (TECM) program, which lets the state speed up projects to keep pace with growth.

What to expect Nov. 13-14

Eastbound I-84 traffic will shift between 8 p.m. and 6 a.m. Friday night, Nov. 13. Westbound traffic will shift between 8 p.m. and 6 a.m. Saturday night, Nov. 14. The westbound loop on-ramp at the Twin Falls Interchange will close during the Saturday night work, and drivers will use the other westbound on-ramp instead.

The work depends on the weather and may be delayed, ITD said. Intermittent I-84 lane closures will continue through the end of the project in late November. ITD asks drivers to leave early, follow signs and pay attention in the work zone, and to check 511.idaho.gov before heading out. Updates are available at (208) 391-3735 or the contact on the original listing.

Living in the Magic Valley

The Twin Falls Interchange links I-84 with U.S. 93, the main route into Twin Falls across the Perrine Bridge. See the Twin Falls city guide and the Jerome city guide, browse new home communities in Twin Falls like Kenyon Meadows and Eastern Sun, or Clover Creek in Jerome, check homes for sale in Twin Falls, or read about the new Chobani Wellness Park and more Twin Falls growth news. Thank you for reading Treasure Idaho.