Turn Signals and Brake Lights: Can It Be Done, Elegantly?

[Steyr Waffenrad c.1925; image via radlmax]I know that I am not the first to bring this up. But when I see details like this from 85 years ago, I wonder what it would take to develop a modern, elegant mechanism whereby squeezing the brake levers on a bicycle would activate a flashing tail light. And furthermore, what it would [...]