SERGEANT BLUFF, Iowa — Sept. 11, 2026 — Crews will intermittently close Interstate 29 for up to 20 minutes at a time starting at 12:01 a.m. Tuesday, Sept. 22, weather permitting, according to the Iowa Department of Transportation’s District 3 Office. The closures are needed so crews can place beams for the new Southbridge interchange, 2.5 miles south of Woodbury County Road D-38 (Exit 141) at Sergeant Bluff.
Both north- and southbound lanes will close intermittently on these dates and times:
- Tuesday, Sept. 22, 12:01 a.m. to 5 a.m.
- Wednesday, Sept. 23, 12:01 a.m. to 5 a.m.
The Iowa State Patrol will assist with traffic control during the closures. Portable message signs will alert drivers to closures and wait times.
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.
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For more information, contact Sarah Tracy, District 3 transportation planner, at 712-274-5831 or [email protected].