A device for lateral guidance assistance for a vehicle includes a programmable electronic control unit and a plurality of distance sensors configured to capture obstacles to a side of and/or behind the vehicle within one or more defined warning regions. The device also includes an optical sensor device configured to capture lane markings and/or a lane width of a current lane of the vehicle and/or of a neighboring lane of the vehicle. The programmable electronic control unit is configured such that at least one of the defined warning regions is shifted based on a detected lane change to a new lane.