Work is set to begin Sunday on a new northbound lane on Interstate 15 between 650 North in Clearfield and 5600 South in Roy.
Crews will work from 7 p.m. to 6 a.m. each day, Sunday through Friday, and possibly on some Saturdays.
Work on the shoulder, which is already under way, will continue until the project is completed, likely by summer.
The Utah Department of Transportation advises drivers to take U.S. 89 to westbound Interstate 84 and return to I-15 in Riverdale or take 1900 West at Clearfield and return to I-15 at Hinckley Drive.