Have you ever heard of a MIRT ?
it's used for emergecy vehicles, they use it to make street lights GREEN every time, for emergency. (amblance, ect.)
I have made one myself, havn't tested it yet, but plan to test in my van: then plan to put it ever descretely on my buell.
You can buy most of the parts from radioshack, and the others from internet: I have extra's if your interested (I bought in bulk to save $$$)
They are HIGHLY ILLEGAL by the way