ANKENY, Iowa – Dec. 12, 2025 – If you drive on northbound Interstate 35 between Ankeny and Ames you need to be aware of upcoming nighttime closures of I-35 to complete the removal of barrier rail.
Northbound I-35 is expected be closed from NE 36th Street north to U.S. 30 for two nights. The closures will be from 8 p.m. until 5 a.m. each night, with the first closure occurring on Tuesday, Dec. 16. The second nighttime closure will be on Wednesday, Dec. 17 with the possibility of closing the roadway again on Thursday, Dec. 18. All closures will be subject to weather conditions.
When the roadway is closed, you will follow a marked detour route around the work zone using varying exits depending on where the contractor is working. Traffic will be on U.S. 69 and U.S. 30, while using NE 36th Street, 126th Avenue, and the Iowa 210 interchanges.
Changes could be made to the detour routes. Please visit 511ia.org for current detour route information before traveling through this construction zone and pay attention to detour signing and messages boards while driving.
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 our 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.
It’s easy to subscribe to Your 511 and sign up to receive email/text alerts. Visit https://new.511ia.org/#login to sign up. For instructions and help with this feature, visit https://www.511ia.org/help/section/how-to-create-and-manage-a-511-account.html.
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For general information about this project, contact Dustin Skogerboe, Iowa DOT Marshalltown construction office, at 641-752-4657 or dustin.skogerboe@iowadot.us.
1308 Iowa Ave. W.
Marshalltown, IA 50158