The effect of tunnel light source and tunnel light color todrivers’ visual performance
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Abstract:
Brightness and illuminance level are the only factors to be considered in the present tunnel lighting specifications and standards of CIE and countries all over the world, but color temperature, color rendering index and light spectrum distribution can also influence visual effect. We selected two tunnels to carry out a small target identification experiment and a color temperature reaction time test, and then analyzed the effect of tunnel lighting CRI (color rendering index) and CT (color temperature) on the driver's visual performance. The outcome shows that the bigger the CRI, the better the driver's visual performance is. For light sources with the similar spectral energy distribution, when the background brightness is the same, the more short waves in the light sources, the better the visual performance is.
