When looking at the ways cyclists and motorists communicate on the road it would seen that motorist often struggle to understand the intent of the cyclist. Many products have concentrated on the requirements of cyclists (which is important) but have forgotten that the main user of hand signals, bike lights etc. is the receiving motorist. Therefore designing for the requirements of motorists first allows for freedom when solving these problems. Then the solution can be applied to a cycling application. Its not really such a black and white transition but you get the picture.
I hope that was clear, love to hear thoughts anyone has on my method/direction.