Originally Posted by
ItsJustMe
The three foot rule is mainly useful for assigning blame after the fact. If someone whacks you with a side mirror while passing, they're automatically at fault. Or you'd think so. They'll probably claim you "swerved" and get off. The only way around that one is to have video evidence.
Video evidence is the only way to go. It isn't subject to the mental meanderings of the human brain.