Originally Posted by
cyccommute
That has been legal in all 50 states for a very long time. It's part of the Uniform Vehicle Code that all states use as their template for traffic rules.
This link does make it sound like the legality of going through the light is a new thing for Washington, though, maybe it's just poor research on the part of the journalist.
Governor Inslee signs the ?Dead Red? bill into law | Seattle Bike Blog