The fundamental dilemma in forward lighting is the converse relationship between providing sufficient visibility for the driver and limiting the excess glare generated toward oncoming traffic. Research performed at the University of Michigan Transportation Research Institute in Ann Arbor indicates that more than 2300 lives per year could be saved if automotive lighting systems provided perfect nighttime lighting conditions.

Constant use of the high-beam lamp could prevent pedestrians from being hit at night and save thousands of lives annually. However, the glare produced by high beams causes discomfort and disability for oncoming traffic...