I have heard the term "invading the dogs space" before and I don't like it. If you are bitten the only defense for the dog is if you were invading his (or his owners) property. That dog, nor his owner, own the road and I'm quite sure the dog doesn't pay taxes. It is the owners responsibility to train the dog to obey our laws. We are not required to obey his. If the owner can't control the dog then he, or she, should get rid of it and get a goldfish.