The invention relates to a method for generating a hazard warning from an ego vehicle (10) to a following vehicle (30) before the following vehicle (30) collides with the ego vehicle (10), the ego vehicle (10) at least one environment sensor (14, 16, 18, 20) for detecting the environment (22) of the ego vehicle (10), with the steps of providing sensor information for detecting the environment (22) of the ego vehicle (10) with the at least one environment sensor (14, 16, 18, 20), in particular in an area in the direction of travel (32) behind the ego vehicle (10), detection of a following vehicle (30) in the environment (22) of the ego vehicle (10) ) based on the sensor information provided by the at least one environment sensor (14, 16, 18, 20), determining an approach speed and a distance (38) of the following vehicle (30) in relation to the ego vehicle (10) based on that of the at least one environmental sensor (14, 16, 18, 20) provided sensor information, determining a remaining time until the following vehicle (30) collides with the ego vehicle (10) based on the approach speed and the distance (38) of the following vehicle (30) , and outputting a warning to the following vehicle (30) if the time until the following vehicle (30) collides with the ego vehicle (10) is less than a predetermined limit value. The invention also relates to a driving support system (12) which is designed to carry out the above method.
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