GRIMES, Iowa – Dec. 30, 2025 – If you drive on Interstate 80/I-35 between the Southwest Mixmaster and Iowa 141 you need to be aware of overnight road closures that may slow down your trip, according to the Iowa Department of Transportation’s Grimes Construction office. Northbound I-80/I-35 will be closed to traffic from 10 p.m. until 4 a.m. on Sunday, Jan. 4, Monday, Jan. 5 and Tuesday, Jan. 6, weather permitting. The University Avenue on-ramp will open on the morning of Tuesday, Jan. 6. When I-80/I-35 is closed, you will follow a marked detour route that uses I-235, 100th Street, NW Urbandale Drive, and I-80/I-35.

The Iowa DOT reminds motorists to drive with caution, obey the posted speed limit and other signs in the work area, and be aware that traffic fines for moving violations are at least double in work zones. As in all work zones, drivers should stay alert, allow ample space between vehicles, and wear seat belts.

The latest traveler information is available anytime through the 511 system. Visit 511ia.org; call 511 (within Iowa) or 800-288-1047 (nationwide).