 The final extension brought SH-9 to the Arkansas state line on 1941-11-12.The only major realignment in SH-9's history since 1941 was the Norman expressway bypass, which was designated as SH-9 on 1971-11-08.After the I-40 bridge disaster, parts of State Highway 9 in eastern Oklahoma served as an emergency detour for eastbound I-40 traffic.