A new mobile communications network between vehicles (car-to-car, or C2C for short) has been brought into operation at the German Aerospace Center (DLR) Oberpfaffenhofen site. Scientists are using it to find out to what extent specially-equipped vehicles can 'inform' each other of their relative positions, state, and the traffic situation. The aim is to develop totally new applications that will lead to increased road safety and traffic-flow efficiency.