Sounds like the on/off ramps might be open?

https://www.news.iowadot.gov/newsandinfo/2023/03/bridge-replacement-on-polk-county-road-f-22ne-126th-avenue-over-i-35-begins-wednesday-march-29.html#:~:text=Drivers%20may%20find%20that%20the%20north%2D%20and%20southbound%20I%2D35%20ramps%20at%20Exit%2096%20may%20be%20open%20at%20times%20depending%20on%20the%20work%20taking%20place.