A method for monitoring and signaling a traffic situation in the surrounding environment of a vehicle, a sensor acquiring a surrounding environment of the vehicle, an object at risk being recognized in the acquired environment, a collision probability and a prediction reliability being determined for the recognized object at risk, and when there is a given collision probability and a low prediction reliability an action of a first type being carried out, and when there is a given collision probability and a high prediction reliability an action of a second type being carried out. The present invention further relates to a driver assistance system for carrying out the method.