The U.S. Route 81 has eight special routes , three in North Dakota , one in Oklahoma , two in Kansas , and two in Texas . U.S. Route 81 has eight special routes . Three are in North Dakota , one in Oklahoma , two in Kansas , and two in Texas .
Laluan A.S. 81 mempunyai lapan laluan khas, tiga di Dakota Utara, satu di Oklahoma, dua di Kansas, dan dua di Texas. Laluan A.S. 81 mempunyai lapan laluan khas. Tiga berada di Dakota Utara, satu di Oklahoma, dua di Kansas, dan dua di Texas.