The invention relates to a drive assisting method for the reversal path of a vehicle which consists of a tow track and a trailer pivotable with respect thereto and is provided with a conventional mechanical steering device. The inventive method consists in selecting a target point (C), which the vehicle path should pass through, Determination in calculating the steering angle instruction β0 according to said target point (C) and the vehicle geometry and in displaying said steering angle instruction β0 in comparison with an actual steering angle β, which corresponds to the position of the member (21) of the steering device, on a display device accessible to a driver.