Portland drivers do not have a clue how to use the on ramp to match freeway traffic speed, and merge without causing problems.
CA drivers are far better drivers, going forward, especially on the freeways. But, they do not have a clue how to back up with a trailer.
Funniest day of my life was at a marina in S CA. It was the 4th of July, with a very long line of people trying to launch their boats.
Sat on a bench drinking beer watching the endless line of jacketknifed trailers on the ramp. With several boats floating in the bay with no one in them. Several did not know to hold onto the painter line to keep them from floating away. Never laughed soo hard, for soo long.