Business Loop I-35 - Ottawa

An application submitted to AASHTO outlined a 6.6 mile business route for Interstate 35 at the city of Ottawa. Business Loop I-35 would have angled northeast from Exit 182 along old U.S. 50 (Elm Street) and overlap with U.S. 59 (Main Street) north through Downtown and K-68 east back to I-35 at Exit 187. Construction of Interstate 35 south of Ottawa cut across the old U.S. 50, which crossed paths with the freeway just east of Exit 182. This alignment was eventually removed, as was the wye interchange where it split with U.S. 59 south.

The route was disapproved by AASHTO on October 13, 1979. U.S. 50 Business was established alongside U.S. 59 north from Exit 183 and east on Keokuk and Logan Streets (K-68) to Exit 187.