The Idaho Transportation Department is responsible for 4,300 bridges throughout the state of Idaho. Each of these bridges is inspected every two years and rated according to a national bridge inspection system. The state has an aggressive system for preserving these bridges and ensuring they remain safe for the traveling public.

Use the map on this website to locate projects in your area. General traffic impacts will be posted at the websites for these projects. To learn about daily lane closures or other changes, call 5-1-1 or visit 511.idaho.gov.

Over the last several years, ITD has replaced and repaired many miles of pavement, bridges and interchanges on I-15. Several more projects are ahead.

Most of I-15 was constructed in the 1960s and 1970s. While yearly maintenance is helpful, any interstate requires major rehabilitation after more than 40 years.