Benefits of Applying Adaptive Lighting to the U.S. and European Low-Beam Patterns.

摘要

This analytical study examined the potential benefits of apply two embodiments of adaptive lighting to the U.S. and European low-beam patterns: curve lighting that involves shifting the beam horizontally into the curve, and motorway lighting that involves shifting the beam vertically upward. The curve lighting simulations paired 80-m radius left and right curves with a horizontal beam shift of 15deg, and 240-m radius curves with a shift of 10deg. The motorway lighting simulations involved upward aim shifts of 0.25deg and 0.5deg. For both curve and motorway lighting, changes in both visibility and glare illuminance were considered. Market-weighted model year 2000 U.S. and European beam patterns were used. We conclude that curve lighting, as simulated here, would substantially improve seeing performance on curves for both types of beams. On left curves (but not on right curves) there would be an increase in disability glare for oncoming traffic. No major discomfort-glare problems would be expected. Although the shifted U.S. beams were found to perform slightly better overall than the shifted European beams, the main difference in performance is between the shifted and nominally aimed beams.