Overview
The Idaho Transportation Department began construction Monday, June 9, 2025 at the intersection of Pocatello Avenue and State Highway 39 in American Falls. The $3.5 million project redesigned the busy intersection to improve safety.
Work will place a signal at the intersection of Pocatello Avenue and SH-39. SH-39 has also been widened to four lanes from the intersection to Fairgrounds Road. New turn lanes were built on SH-39 for traffic heading to Pocatello Avenue.
In the spring of 2026 ITD will return to install the traffic signal.

Contact project team
If you have questions or comments about this project, please contact the project team at Justin.Smith@itd.idaho.gov