CASCADE – The Idaho Transportation Department will install a new Dynamic Message Sign tomorrow in Round Valley to enhance safety and improve communication for drivers traveling along State Highway 55 between Boise and McCall.
The new sign will be located on the southbound side of SH-55 at milepost 102, just before drivers descend toward Rainbow Bridge and enter the narrow canyon stretch of highway.
The sign will display real-time alerts about wildfires, traffic delays, and other emergencies that may impact travel through the corridor. SH-55 is one of Idaho’s most heavily traveled mountainous highways, especially during summer and holiday weekends. Limited cell service in the area makes timely roadside messaging essential.
“Reliable communication in this area is critical, especially during wildfire season or major traffic incidents,” said ITD Project Manager Javier Hernandez. “This new DMS will allow us to give travelers accurate, up-to-date information when they need it most.”
Installation is scheduled to begin tomorrow and will take several days to complete. A single-lane closure will be in place during work, with flaggers directing traffic. Minimal delays are expected.
As part of the project, crews will also install a 50-foot camera pole aimed at the new DMS. This camera will allow ITD to remotely monitor, test, and verify the sign’s performance, helping ensure it’s working properly without needing to send maintenance crews to the site.
Before heading out, motorists are encouraged to visit 511.idaho.gov or use the Idaho 511 app for the latest travel conditions.