A method and implementing system is provided in which light beams are projected from a first object upon a second object, and the relationship of the images projected upon the second object is used to provide an indication of the distance between the two objects. In an example, two light beams are projected at a predetermined angle of convergence from a vehicle such that the beams intersect between the vehicle and an object located in the path in which the vehicle is moving, for example, behind the vehicle. The intersection of the beams is selectively adjustable by adjusting the angle of convergence of the projected beams to provide an indication when the vehicle has backed to a position which has been determined to be a safe distance from the object.