High Quality Content by WIKIPEDIA articles! State Highway 9, abbreviated as SH-9, OK-9, or simply Highway 9, is a major east–west highway in the U.S. state of Oklahoma. Spanning across the central part of the state, SH-9 begins at the Texas state line near Madge, Oklahoma, and ends at the Arkansas state line near Fort Smith, Arkansas. State Highway 9 is a major highway around the Norman area. At 350 miles (563.3 km), SH-9 is Oklahoma`s second-longest state highway (second to State Highway 3).