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Upcoming Traffic Changes
- Both southbound/westbound Douglas Ave on ramps and the Hickman Rd off ramp were opened on December 23, 2025.
- The northbound I-35/eastbound I-80 University Ave on ramp and Hickman Rd off ramp will remain closed at this time. We expect them to be opened to traffic in the spring of 2026 (likely sometime in April or May). The opening date depends on when it is warm enough to finish the Walnut Creek bridge so it can be opened to traffic.
About the Project
What: Replacement of the interchange at Interstates 80/35 and Hickman Road.
Why: Data shows that traffic volume in this area is projected to increase nearly 35 percent by 2042. The updated interchange will improve traffic flow and increase safety.
How: A diverging diamond configuration, similar to the interchange update in Ankeny at I-35 and 1st Street, will be constructed to increase safety. We’ll also be adding lanes to Hickman Road and adding lanes on I-35/80 from University to Douglas. Learn more about Diverging Diamond Interchanges.
When: All the design work has been completed and the project was awarded to United Contractors in July 2024. Construction began shortly after that. This is a multi-year project that is expected to be finished in 2028.
Project Budget: $94 million
Back to topLong Term Detours
Visit Iowa DOT News to find detour information for closures lasting less than a week.
Greenbelt Trail
Beginning October 1st, the Greenbelt Trail will be closed where it crosses under I-35/80. The bridge is being reconstructed and it is important to keep the work zone clear for everyone’s safety.
Two detours are in place during the closure:
- The first will take you south to University Avenue, then north on NW 114th Street to get back on the trail heading east.
- The other option goes north along the Timberline Park Trail to the Douglas Avenue Trail. Follow that trail east to 100th Street and then go south to get back on the trail.
Photo Gallery
Hickman Interchange Construction
Planning Images
Pedestrian, storm water, and landscaping details (2.37 MB) Archived .pdf
Bridge/Retaining Wall and proposed aesthetics and landscaping (507.28 KB) Archived .pdf
Iowa 511
Real-time updates about weather-related road conditions, construction, commercial vehicle restrictions, road closures, and other events that impact traffic in Iowa.