Thus, the headlights must be properly aligned so that the driver does not dazzle other drivers on the road and for achieving the best vision on the road. It is recommended that the aim should be checked at least once every one year or time the headlight is changed or front-end body work is done. The adjustment process involves two screws on the headlight housing: half would be designed for the vertical motion and the other half for the transverse motion. One of the elementary methods in adjustment needs a blank wall to the vehicle's front at a distance of 25 feet and, a level ground. The vertical masking tape must be used on the wall and such points as the centerline of the vehicle and the centerline of both headlights must be marked with the help of tapes; one horizontal tape line is also necessary. It is advised that the adjustments should be made when the vehicle is stationary, and the gas tank is half full, equally it should not be overloaded. Concerning low beams, the high-intensity zone should be located two inches below the horizontal line and two inches to the right of the vertical one. The vertical screw at the head of the apparatus varies the height of the beam and horizontal one-the direction of it. While the beam is on high, the high-intensity area is supposed to be below the straight line. Due to the Requirements or laws it may not be suitable to align both top and bottom beams to an optimum level, so for safety should adjust the bottom beams. One should need to get the car's headlights realigned by a professional as soon as possible.