 From Springville north to Salt Lake City , US @-@ 89 parallels — and for a distance overlaps — Interstate 15 , following the old Arrowhead Trail , once the main highway from Salt Lake City to Los Angeles , through a number of downtowns . Numerous state highways connect US @-@ 89 to I @-@ 15 , including SR @-@ 77 in Springville , SR @-@ 114 in Provo , SR @-@ 52 in Orem , SR @-@ 180 and SR @-@ 145 in American Fork , and SR @-@ 73 in Lehi . In Provo , US @-@ 89 meets US @-@ 189 , its only branch , which heads northeast through Provo Canyon to Heber City , connecting to I @-@ 80 and bypassing Salt Lake City . North of Lehi , US @-@ 89 merges with I @-@ 15 ( at exit 282 ) , which has been built on or near the old road through a gap in the Traverse Mountains ( elevation 4800 feet / 1500 m ) into the Salt Lake Valley . The routes split in Draper , formerly with a direct interchange north of SR @-@ 71 , but US @-@ 89 traffic must now exit at SR @-@ 71 ( exit 291 ) , turn east to Factory Outlet Drive , and follow this frontage road to the location of the former split . From here all the way to downtown Salt Lake City , US @-@ 89 is marked along State Street , a major north – south street that ends at the Utah State Capitol . After passing through Sandy , Midvale , Murray , Millcreek Township , and South Salt Lake , State Street enters Salt Lake City at the intersection with SR @-@ 201 ( 2100 South ) . 
