I came across the following today. This GPS based concept sounds like it has some merit. Certainly would not need to be limited to any particular bike manufacturer. Comments? "Honda Demonstrates Life Saving Motorcycle Technology In its efforts to improve safety for everyone, especially vulnerable road users, Honda's leading motorcycle to car communication system is being demonstrated for the first time in Europe at the CAR 2 CAR Communication Consortium event taking place at the Opel Test Track in Dudenhofen, Germany, from 22-23 October 2008. The system generates warnings to riders and drivers of other vehicles by continuous exchange of positioning data from satellite GPS sources. This is particularly relevant as road users approach intersections, alerting them to other vehicles that are potentially on a collision course, allowing avoidance manoeuvres."