Many drivers make it too easy for themselves to change lanes and do without what they have learned.
In order to avoid accidents when changing lanes, drivers should definitely use the shoulder look they learned in the driving school. Just blinking before steering is not enough to ensure a safe lane change. The expert organization Dekra recommends the classic sequence of looking over the shoulder: inside mirror, outside mirror, flashing and looking over the shoulder to see whether the side lane is actually free. Only then do you steer into the next lane.