SIOUX CITY, Iowa – Aug. 29, 2025 – If you drive on Iowa 175 in Onawa you need to be aware of an upcoming construction project that may slow down your trip, according to the Iowa Department of Transportation’s (DOT) District 3 office.  Beginning on Monday, Sept. 8th, and running until Saturday, Sept. 13th (weather permitting), crews will close Iowa 175 at the Union Pacific Railroad crossing for a combined Iowa DOT/Union Pacific Railroad project.

When the roadway is closed, eastbound traffic will follow a marked detour route using 10th Street, Granite Street and 6th Street. Westbound traffic will follow a marked detour route using 6th Street, Cameo Street, and 10th Street

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).