Speed & Sprocket by Ridar

Speed & Sprockets powered by Ridar Systems provides cyclists with an enhanced level of safety by using their location, speed & direction to broadcast their presence to other vehicles.
Ridar Systems is a driver awareness system that uses predictive algorithms to locate nearby cyclists 15 seconds before you see them and boost human attention. This predictive notification is then pushed out to drivers when cyclists are ~5 seconds away from a possible collision.