View and into Cuyahoga Heights. In Cuyahoga Heights, SR 21 reaches its northern terminus at I-77 exit 157. History SR 21 follows the route of the old U.S. Route 21, a major north–south highway that connected greater Cleveland, Ohio, to southern South Carolina. South of Strasburg, Ohio, near the current southern terminus of SR 21, the designation of US 21 was moved to the new Interstate 77 freeway in east-central and southeastern Ohio by the early 1970s and then decommissioned. North of Strasburg, what remained of US 21 as a route separate from I-77 became SR 21. While I-77 directly serves the larger cities of Canton, Akron and Cleveland, SR 21 connects the smaller communities of Massillon and Norton (and indirectly Barberton), and serves some Akron and Cleveland suburbs as a local through route. Very heavily traveled before the Interstate era, much of SR 21 is divided highway or even freeway. Junction list References 021 Transportation in Tuscarawas County, Ohio Transportation in Stark County, Ohio Transportation in Wayne County, Ohio Transportation in Summit County, Ohio Transportation in Cuyahoga County, Ohio U.S. Route 21