The qualitative street illumination of highways raises productivity of the visual device and essentially influences in reduction the number of failures. It is established that the road accident total can be reduced by 30 %, and number of incidents on roads of the state value and in zones of special danger (for example, at crossroads) on 45 %.
It is recommended to illumination of highways to use lamps with good color rendering properties for underlining of color contrasts and increase of perceptibility of information. Many researches have shown that white illumination has advantages before yellow illumination:
- the white illumination improves night vision on 40-100 % concerning illumination of other spectrum;
- the white illumination is improved by color recognition (color rendition) that in turn increases contrast of the image and perception of depth of space.
Lamps with an unsatisfactory color rendition (for example, sodium of low pressure) have a narrow yellow spectrum and are suitable only for pedestrian crossings, territories of seaports and security illumination.
The recommended light-emitting diode fixture for highways and streets:
