In a method for line-of-sight-independent data transmission in a car-to-car or a car-to-infrastructure communication system, electromagnetic radiation having encoded data is transmitted from a transmitter located in a first vehicle or in a traffic infrastructure object, and a reflector system is provided for at least partially reflecting the transmitted electromagnetic radiation, wherein the reflector system is arranged so that the transmitted electromagnetic radiation arrives at a receiver located in a second vehicle or in the traffic infrastructure object. The reflected electromagnetic radiation having the encoded data can then be received by the receiver even when line-of-sight communication between the vehicles is impossible.