Most of the passing close calls having to do with oncoming traffic has been not on a blind section, but where the oncoming car was clear and obvious and some jack wagon decided to try to pass anyway. In both cases I can think of in recent memory the passing vehicle got passed me, giving me enough room, and nearly ran the oncoming vehicle off the road. I don't know if they thought they had more time/room or what... Maybe they misjudged my speed or their depth perception in relation to bikes is off...