Interstate 84 expansion project in Nampa begins Sept. 26

The outside shoulders of I-84 will receive temporary widening to accommodate traffic during future construction.

The Idaho Transportation Department will begin reconstructing and widening the shoulders of I-84 between the Karcher and Franklin Boulevard interchanges on Wednesday, Sept. 26. This is the first step of widening I-84 through Nampa.

All traffic lanes will remain open between 5 a.m. and 10 p.m. as crews will work primarily at night. Speeds will be reduced to 55 mph during the day and night. Traffic will be down to one lane in each direction during construction times. The work will continue until mid-November.

The newly reconstructed shoulders will be used to keep two lanes of traffic flowing in each direction when I-84 is widened to three lanes between Karcher Road and Franklin Boulevard starting next spring.

In 2019 and 2020, ITD will replace the Karcher Overpass, redesign and reconstruct the Northside Interchange, and rebuild the bridges over the railroad and Mason Creek. Improvements are expected to improve safety, capacity and traffic flow in Canyon County for many years.

A separate environmental study is underway to identify needed improvements between the city of Caldwell and the Karcher Interchange.

For more information on the I-84 expansion project, please visit itdprojects.org/i-84-karcher-to-franklin or text 84CORRIDOR to 22828.

Test pile driving rescheduled for July 9-12 on I-84 at Northside Blvd.

Crews drive pylons into the ground for testing

Shoulder restrictions will be in place on Interstate 84 in Nampa at the Northside Boulevard interchange July 9-12. Crews will be driving test piles in the center median as part of early prep work for ITD’s Northside Interchange Replacement Project.

Pile driving will be done during the day; this work is noisy. No lane closures are anticipated, but drivers are urged to slow down and pay attention in the work zone. Crews will set up traffic control and a work zone the night of July 9 and are anticipated to be complete by the end of the week. Learn more at itd.idaho.gov/84corridor.

This work was originally scheduled to take place June 18-20. It was delayed due to wet ground conditions.