There is a "WA 14 Business Loop" designation in Washougal at least. https://www.bing.com/maps?toWww=1&redig=AF0702F13E544318A5E8591F8E6FB5E9&cp=45.570332%7E-122.294749&lvl=16.6&pi=-1.4&style=x&dir=345.9 