SR 348 was commissioned in 1935, routed on its current route, with the eastern terminus at its intersection with SR 73 in Otway.[2][3] In 1939 the route was extended east to U.S. Route 23, near Lucasville.[4][5] A section of SR 348 from Otway to Lucasville was originally designated a part of Corridor B on the Appalachian Development Highway System. Only a section from U.S. Route 23 to west of SR 104 was ever completed.[6][7][8]
^Ohio Department of Highways (1939). Ohio Highway Map(PDF) (Map). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 7408341. Retrieved October 23, 2013.