The Oregon driver's manual actually has a chapter about cycling. It not only addresses what are expected from cyclist but also how drivers should regard cyclists on the road. I'm sure there are many drivers who skip this section thinking it doesn't pertain to them, but at least it's there.

When we moved to Washington, I saw many riders on the sidewalk(not allowed in Oregon unless you're a kid) and was curious if the cycling laws differed here. So when I went to get my Washington driver's license, I checked out this state's manual. There was only one or two measely paragraphs(Not easy to find! I had to look through three or four times to find it. ) on cycling and it didn't even cover very well how cars and bicycles should interact. I don't have it in front of me, but I believe it said that if a bicycle is on the road, treat it like a vehicle. If it's on the sidewalk then treat it like a pedestrian. But that cyclists needed to stay as safely to the right as possible, which IMO most vehicle operators just read it as bicycles should stay to the right out of their way.

As cyclists, most of us try to gather information about laws that pertain to us, but what incentive do drivers really have?