 The change was necessitated by the coming of the Interstate Highway System to Ohio, which included construction of Interstate 277 in the Akron vicinity.Ohio follows a standard that no route number can be duplicated between different types of state highways, so SR 277 became SR 207.By 2007, SR 207 was extended on the south end via a nearly concurrency with SR 104, and an all-new alignment running east from SR 104 across the Scioto River to a new interchange with the US 23 expressway in northern Ross County, north of Chillicothe.