Hello BikeForums, I wanted to create a thread about vehicle detection systems. Mobileye has just come out this year http://www.mobileye.com. A system like this could be mounted to the back of a bicycle and emit a loud alarm when you are being approached by a fast moving vehicle from behind, possibly eliminating a significant portion of deadly bicycle crashes. Rear end collisions are particularly scary because you cannot see the driver coming at you. It costs a lot at this time, but I could really see this coming down in price. Questions/comments?