The signal minder is the best way to go.

Or (if ya want to get original with it) an old school yellow dash strobe mounted to the top of your helmet. That will get some attention.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe