I-35 northbound: Entrance ramp closed.

At Entrance ramp from Northeast 36th Street. The entrance ramp is closed due to road construction work. A detour is in operation. Follow the Iowa DOT-recommended detour around the closure. See map for detour(s) . Until November 20, 2026 at about 6:00AM CDT. Full schedule below: • April 15, 8:00PM - November 20, 6:00AM Comment: Marshalltown RCE (800-251-2706) - Polk County