Driver-assistance system for controlling a velocity of a vehicle during an approach to a traffic light

The present disclosure relates to a driver-assistance system for controlling a velocity of a vehicle. The system having a receiver and a control system. The receiver is configured to receive traffic light data generated by a traffic light control unit for controlling a traffic light. The control system is configured to control the velocity of the vehicle dependent on the traffic light data. The traffic light data indicates a current phase of the traffic light. The control system is configured to control the velocity of the vehicle dependent on the traffic light data such that the vehicle stops in front of the traffic light when the current phase of the traffic light is a red phase and controls the velocity of the vehicle dependent on the traffic light data such that the vehicle reaches a prescribed target velocity when the current phase of the traffic light is a green phase.