 State Route 1 , which became U.S. Route 91 in 1926 , ran north – south through central and northern Utah in the 1920s . State Route 2 left SR @-@ 1 at Logan and ran east through Logan Canyon to Garden City ; this had been built with federal aid as a forest road in about 1918 . The road north from Garden City to Idaho was added to the system in 1921 , and became part of State Route 3 . In 1927 , the legislature added State Route 49 , an alternate southern entrance to Ogden that left SR @-@ 1 at Farmington and merged with SR @-@ 5 ( US @-@ 30S ) at Uintah . ( Present SR @-@ 60 was numbered as a branch of SR @-@ 49 until 1935 . ) State Route 69 , stretching from US @-@ 191 ( now SR @-@ 13 ) just north of Brigham City north and east to US @-@ 91 in Logan , became a state highway in 1931 . The 1930s extension of US @-@ 89 took it north from Thistle along US @-@ 50 ( SR @-@ 8 ) to Springville , US @-@ 91 ( SR @-@ 1 and SR @-@ 106 , later all SR @-@ 1 ) to Farmington , SR @-@ 49 to Uintah , US @-@ 30S ( SR @-@ 5 ) to Ogden , US @-@ 91 ( SR @-@ 1 ) to Brigham City , SR @-@ 69 to Logan , SR @-@ 2 to Garden City , and SR @-@ 3 to Idaho . US @-@ 89 was removed from SR @-@ 69 and overlapped with US @-@ 91 between Brigham City and Logan in the mid @-@ 1950s . 
