Those grooves are nasty....they are aslo on both sides of 405 up near Kirkland. I think 405 south has the carpool lane almost done.
Karen and I were riding to Leavenworth and on hwy2 we encountred a few miles of grooves across all lanes. They were nice enough to leave a nice ridge in the middle of one of the lanes for some extra excitement

I ususlaly slow doen a bit cause you know if you hit grooves at teh end there is more than likely going to be a bump! I also tell myself over and over...no death grip...relax adn feel the bike.