 State Route 502 ( SR 502 , officially known as the Battle Ground Highway ) is a 6 @.@ 12 @-@ mile @-@ long ( 9 @.@ 85 km ) state highway in the U.S. state of Washington , serving the city of Battle Ground in Clark County . The highway travels due east from an interchange with Interstate 5 ( I @-@ 5 ) north of Mount Vista through Dollars Corner and Battle Ground to an intersection with SR 503 , serving as connector between Battle Ground and I @-@ 5 . Prior to the 1964 highway renumbering , SR 502 was part of Secondary State Highway 1S ( SSH 1S ) , which was established in 1937 . The highway traveled south from its current western terminus until the construction of a new interchange with I @-@ 5 in 2008 , part of a project to widen SR 502 and install a median barrier on the roadway . 
