SIOUX CITY, Iowa – March 2, 2026 – If you drive on Interstate 29 near Onawa (Exit 112) you need to be aware of an upcoming project that may slow down your trip, according to the Iowa Department of Transportation’s Sioux City construction office.

On Wednesday, March 4, weather permitting, I-29 traffic near Onawa (Exit 112) will be placed in a head-to-head traffic pattern so a maintenance project can be completed on the Iowa 175 bridge. There have been multiple hits to the structure in the past. Traffic on the Iowa 175 bridge will remain in a one-lane pattern until this maintenance project is completed.

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); stay connected with 511 on Facebook or X (find links at  https://iowadot.gov/travel-tools/iowa-511/511-social-media-sites); or download the free app to your mobile device.