Aiming Screen Area
The area shall consist of a level surface large enough to allow for a vehicle and an additional 7.62 m (25 ft) as measured from the face of the headlamps to the aiming screen.
The screen shall be a wall or flat surface at least 1.52 m (5 ft) high by 3.66 m (12 ft) wide with a matte white surface well-shaded from extraneous light, and 90 degrees to the floor. The screen shall be provided with a permanent vertical reference line 2 feet from the left edge of the screen, two laterally adjustable vertical tapes, and one vertically adjustable horizontal tape.
After the aiming screen has been set up and located, paint or tape a reference line on the floor 15.24 m (50 ft) from the vertical reference line on the screen. This line shall be perpendicular to the aiming screen and a mark placed at 7.62 m (25 ft) from the screen.