Business Loop I-75 - Sidney

Business Loop I-75 comprised a 4.4 mile long route wholly within the city of Sidney. The east to west leg overlapped with SR 47 (Michigan and Court Streets) between Exit 92 and Downtown. A one way couplet (Main Avenue north / Ohio Avenue south) took the route north alongside SR 29 to Wapakoneta Avenue. SR 29 south joined Business Loop I-75 from Pike Street east while northbound overlapped with the route to Russell Road west. Wapakoneta Avenue (old U.S. 25) heads north to meet I-75 at Exit 94, where Business Loop I-75 ended and County Road 25A resumed.

Reassurance markers and directional shields remain posted as recently as 2015 along SR 47, in Downtown and along Wapakoneta Avenue. Guide signs on I-75 dropped the designation by 2009.