Richfield
- The original interchange between the Ohio Turnpike and Ohio State Route 21 (formerly U.S. Route 21) was a trumpet-T. After Interstate 77 was built near Richfield, the interchange was rebuilt as a double trumpet to accommodate increased traffic. The interchange was rebuilt as a direct connection with I-77 in 2001, a folded diamond was built in the middle to connect to SR 21. Meanwhile, the old connector ramp and toll booth still stand.
Read more about this topic: List Of Unused Highways In Ohio, List