They're legal in King County, but they're required to be for business within a certain mile radius. There's several of them along the 522, for example. https:

They're legal in King County, but they're required to be for business within a certain mile radius. There's several of them along the 522, for example. https://maps.app.goo.gl/cmCVXvJJgfYUAtXF9 https://maps.app.goo.gl/cmCVXvJJgfYUAtXF9