More tech transferable between bicycles and motorcycles.
http://www.gizmag.com/backtracker-bicycle-radar-review/33143/
Lets one know when something is approaching from the rear.
"So just check your mirrors or turn your head."
Obviously. But human beings have a way of not always doing what we could or should. Therefore: technology.
this is an excellent idea!
i like the fact that the rear light blinks rapidly as a car approaches. would buy.