Method, driver assistance system for wireless communication between a vehicle and a traffic infrastructure and system for controlling the traffic flow

A system for controlling a traffic flow of vehicles in road traffic, comprising:

• permanently installed roadside devices for optical output of information which are detectable by the vehicles;
• and
• receiver modules located on the vehicles,
• wherein the roadside permanently installed devices are configured as lighting units such that they output in a visible range of light via an optical data transmission path the information comprising an optical modulated signal, the optical modulated signal being sent to one or more of the vehicles, and
• wherein the receiver modules of the one or more of the vehicles to which the optical modulated signal is sent detects the optical modulated signal and converts it into a digital code word from which the information is derived and used to control the vehicle.