A state highway to be known as state route number 82, and designated as a Washington green highway, is established as follows:
Beginning at a junction with state route number 90 in the vicinity of Ellensburg, thence southerly and easterly by way of Yakima, Union Gap, Sunnyside, Prosser, Kiona, and Goose Gap west of Richland, thence southeasterly near Kennewick and southwesterly by way of the vicinity of Plymouth to a crossing of the Columbia river at the Washington-Oregon boundary line.