CHUBBUCK — Beginning Monday, the Idaho Transportation Department will close Chubbuck Road underneath Interstate 15 to add facilities for bicyclists and pedestrians. The underpass was partially completed and opened for the school year, but with schools out for the summer, the contractor will be returning to complete work.

Construction is scheduled to be completed by the end of the month. Traffic will be detoured through the Northgate Interchange while work continues.

The old Chubbuck Road Overpass, built in 1962, made it difficult for large loads travelling north and south on I-15 due to its limited height. As part of the System Interchange project, the department decided to transform Chubbuck Road into an underpass to eliminate height restrictions. The new design includes additional facilities for pedestrians and cyclists. Those changes necessitated a closure for demolition in 2022 and the construction of the two newly completed bridges to carry I-15 over Chubbuck Road.

Originally built in the 1960s, the Interstate 86 and I-15 System Interchange is undergoing a rebuild to improve safety and replace aging infrastructure. Work began in 2022 and is scheduled to be completed this year.

Motorists should carefully follow signs and posted speed limits while traveling through the construction area. With crews working day and night at the System Interchange, it is especially important that drivers be alert and travel safely.

Motorists are encouraged to use 511.idaho.gov or the 511 app to keep track of project detours. Project details are available on ITD’s projects website at itdprojects.idaho.gov/i-86i-15-system-interchange.