Audi, BMW, DaimlerChrysler, Fiat, Renault and Volkswagen have formed the Car-2-Car Communication Consortium (C2C CC, www.car-2-car.org), with the objective of establishing a common open standard for vehicle-to-vehicle communications systems. The alliance will design inter-car communication protocols with the aim of providing improved collision avoidance and better traffic flow management systems. A vehicle whose sensors pick up dangerous driving conditions might, for example, be so equipped to automatically warn drivers of others cars in the vicinity. Individual cars would be equipped not only to send and receive information, but also to relay signals to other vehicles in a so-called ‘Multi-Hopping’ system. The protocols, which will use wireless-LAN networks, would organise the data exchange between vehicles, assembling themselves spontaneously without the need for any external telematics infrastructure. The Car-2-Car Consortium is lobbying the EU for permission to use a dedicated radio frequency for the system.