A driver assistance device (100) designed to be installed in a vehicle, comprising: an
image acquisition unit (111, 112) designed to capture an image of another
vehicle driving behind the one vehicle equipped with the driver assistance device (100); a close-range determination unit (102) designed to determine, on the basis of the image captured by the
image acquisition unit (111, 112), whether the other vehicle is following closely behind the first vehicle; a continuity determination unit (103) configured to determine whether a dense approach, as determined by the dense approach determination unit (102), was carried out continuously; an
information provision unit (106) configured to provide a driver of one vehicle with information about the other vehicle when the continuity determination unit (103) determines that the close following was carried out continuously; and wherein the driver assistance device (100) is designed to determine, on the basis of the image captured by the
image acquisition unit (111, 112), whether the
tailgating of the other vehicle has ceased; and with a memory (121) designed to store the information about the other vehicle therein, wherein the driving assistance device (100) is configured to store the information about the other vehicle in the memory (121) if the other vehicle overtakes the first vehicle and the close following of the other vehicle has ended, , and wherein the driving assistance device (100) is configured not to store the information about the other vehicle in the memory (121) if the close following of the other vehicle has ended, and the other vehicle has changed course or the other vehicle maintains a specific distance from the first vehicle.