New sign on SH-55 to improve communication

CASCADE - Drivers on State Highway 55 should expect short delays Wednesday as the Idaho Transportation Department installs a new digital message sign in Round Valley.

A crane will be on site beginning at 10 a.m. and continuing through the afternoon to set the overhead sign structure at milepost 102 just south of Cascade near the descent toward Rainbow Bridge.

During installation, crews will reduce SH-55 to a single lane with alternating traffic. A full closure of up to 15 minutes may be needed while the structure is lifted into place to keep travelers safe from the suspended load.

The new sign will make SH-55 safer by providing real-time alerts about wildfires, delays, and other emergencies along one of Idaho's busiest mountain corridors. Limited cell service in the canyon makes roadside communication especially valuable for drivers. Drivers can expect the sign to be operational by the end of the year.

Motorists should slow down, follow flagger directions, and watch for crews and equipment in the area.

For the latest updates on traffic impacts and road conditions, visit 511.idaho.gov or download the Idaho 511 app.