 State Route 22 ( SR 22 ) is a 35 @.@ 84 @-@ mile ( 57 @.@ 68 km ) long state highway spanning Yakima and Benton counties in the US state of Washington . Existing since at least 1937 , the highway serves to connect several small communities that have been bypassed by Interstate 82 ( I @-@ 82 ) / U.S. Route 12 ( US 12 ) . Except for the section through Toppenish and the southeastern bypass of Prosser , the highway is lightly traveled passing mainly through rural farmland . The highway parallels a BNSF Railway line for a majority of its route , with the rail line predating the highway by at least 27 years . 
