A method at a vehicle of adapting safety mechanisms of a vehicle safety system, comprising: acquiring data to create a representation of a current vehicle surrounding; the method being characterized in comprising: comparing the created representation to a plurality of pre-stored representations of vehicle surroundings, each having at least one risk assessment measure associated with it which stipulates whether to trigger at least one safety mechanism of the vehicle safety system, and if there is correspondence between the created representation and one of the pre-stored representations: detecting a vehicle behaviour associated with the current surrounding by taking into account an acquired indication of a frequency with which the vehicle previously has encountered the current vehicle surrounding; and adjusting, based on the detected vehicle behaviour, triggering of said at least one safety mechanism associated with the at least one risk assessment measure of the pre-stored representation of the current vehicle surrounding for which there is a match with the created representation. acquiring data to create a representation of a current vehicle surrounding; the method being characterized in comprising: comparing the created representation to a plurality of pre-stored representations of vehicle surroundings, each having at least one risk assessment measure associated with it which stipulates whether to trigger at least one safety mechanism of the vehicle safety system, and if there is correspondence between the created representation and one of the pre-stored representations: detecting a vehicle behaviour associated with the current surrounding by taking into account an acquired indication of a frequency with which the vehicle previously has encountered the current vehicle surrounding; and adjusting, based on the detected vehicle behaviour, triggering of said at least one safety mechanism associated with the at least one risk assessment measure of the pre-stored representation of the current vehicle surrounding for which there is a match with the created representation. comparing the created representation to a plurality of pre-stored representations of vehicle surroundings, each having at least one risk assessment measure associated with it which stipulates whether to trigger at least one safety mechanism of the vehicle safety system, and if there is correspondence between the created representation and one of the pre-stored representations: detecting a vehicle behaviour associated with the current surrounding by taking into account an acquired indication of a frequency with which the vehicle previously has encountered the current vehicle surrounding; and adjusting, based on the detected vehicle behaviour, triggering of said at least one safety mechanism associated with the at least one risk assessment measure of the pre-stored representation of the current vehicle surrounding for which there is a match with the created representation. detecting a vehicle behaviour associated with the current surrounding by taking into account an acquired indication of a frequency with which the vehicle previously has encountered the current vehicle surrounding; and adjusting, based on the detected vehicle behaviour, triggering of said at least one safety mechanism associated with the at least one risk assessment measure of the pre-stored representation of the current vehicle surrounding for which there is a match with the created representation.