[hcoles]

This lands in a "grey" area. I believe in CA cars are not supposed to cross a double yellow line (DYL) to pass. However, if they have a clear line of sight then they can/do cross and give you extra or at least enough room. In CA the room is 3 feet from the most outside part of the bike. I would rather they cross the line and give me extra room. We have some popular cycling roads around here that are narrow (no shoulder). On a right direction curve with limited visibility the situation becomes dangerous. If you are cycling and hear a car coming you need to get over (even stop) or risk getting hit. Since many drivers over-drive their sight - they can't stop or slow down in time. The car doesn't want to cross the DYL at that point because there is not an adequate line of sight. Car drivers come in all shapes and sizes - some don't like cyclists and have limited defensive driving skills. If you are riding a bike you are vulnerable. I don't see why calculating a passing time is relevant.