It's been a few years, but I don't recall them in Kalaloch, La Push, or Ozette... but then that was '09. The picture of the no warning signs warning was on the road to Ozette. It does appear that they are there now, so it might have been me misremembering (
https://goo.gl/maps/ofY3GGHDnuG5GWaZ6 )