A. Whenever the driver of any vehicle equipped with an electric driving headlamp or headlamps is within five hundred feet (500') of another vehicle approaching from the opposite direction, the driver shall dim or drop such headlamp or headlamps.
B. The driver of any vehicle equipped with an electric driving headlamp or headlamps shall dim or drop such headlamp or headlamps when there is another vehicle traveling in the same direction less than three hundred feet (300') to the front of him. (1976 Code §19-214)