Is it legal to turn left across a double yellow line?
It is legal to turn left across a double yellow line in Washington State UNLESS it is 18 inches or wider across and has a solid or cross-hatched center. Most double yellow lines in Wenatchee have a 12-inch total width and are used to designate "No Passing" zones. Most left turns that are prohibited in Wenatchee are restricted with appropriate curbing.
From:
http://www.cityofwenatchee.com/engin...m#stop%20signs