Under MUTCD pavement-marking standards, what is the difference between a broken line and a dotted line?

1. A broken line indicates a permissive condition; a dotted line warns of or guides through a change in lane function
2. A dotted line always means stop; a broken line always means yield
3. A broken line is only for pedestrians; a dotted line is only for trains
4. They mean exactly the same thing in all situations