Around here I don't think most drivers have had to interact with a bicycle on the road before. I'm sure they've seen them on TV. I end up playing traffic conductor, pointing at people and directing them what to do when they have the right of way and won't take it; mostly they get the hint and do the right thing and it's all very amiable. If even that doesn't work I'll get off the road and dismount to make it clear I'm not going until they do.