 In 1919 , the state legislature redefined the state road system to include only a short list given in the law and any federal aid projects . The entire route from Kanab north was kept , including both approaches to Kanab and the two roads to Nephi and Thistle . In addition , a short extension from Kanab south to Arizona was added . An amendment in 1923 removed most of the original route through Johnson Canyon , but added a second route to Alton from the west , effectively forming a large triangular loop through that town . ( The old route from Alton south to Kanab would be re @-@ added to the state road system in 1933 as SR @-@ 136 . ) In the early 1920s , the State Road Commission assigned numbers to several major state roads ; the route from Arizona northerly through Kanab and Richfield to Nephi became State Route 11 . The numbers were officially adopted by the legislature in 1927 , with both the main route and the loop through Alton being defined as SR @-@ 11 ; a new State Route 32 followed the branch to Thistle . The Alton loop was removed from SR @-@ 11 in 1941 , with the south half remaining in the system as part of SR @-@ 136 . Despite these designations , the majority of SR @-@ 11 and all of SR @-@ 32 were instead marked as US @-@ 89 , with the remainder of SR @-@ 11 between Pigeon Hollow Junction and Nephi marked as US @-@ 189 from about 1930 until 1938 . 
