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Technical Standards and Requirements for Road Lighting
May 18,2018
Road lighting is an indispensable part of urban construction. Setting up lighting on both sides of the road not only illuminates for pedestrians and vehicles but also reduces driver fatigue and ensures traffic safety. In other countries, some public lighting in cities is also included in road lighting. Lighting in streets, highways, bridges, etc., falls under road lighting.
Road lighting should first meet the requirements for drivers to accurately identify various situations on the road at night, respond to obstacles in a timely manner, avoid traffic accidents, and reduce visual fatigue.
Due to the need for a certain minimum brightness difference between the surface of objects and the road surface to perceive objects, the average road surface brightness is an important indicator. According to experiments, the average road surface brightness value should be taken as 1.5 to 2.0 candelas per square meter.
It is divided into overall road surface brightness uniformity and longitudinal brightness uniformity. The former indicates the brightness uniformity that affects driver comfort; the latter indicates the brightness uniformity that affects the visibility of obstacles.
Lighting devices and installation methods should be reasonably selected based on specific roads and environments to achieve good lighting effects and energy savings. Lighting devices should have reasonable light distribution to effectively direct light towards the illuminated objects, limit glare, and protect the light source. Previously, incandescent lamps were mainly used as lighting sources, but now efficient gas discharge lamps are used, such as fluorescent high-pressure mercury lamps that improve light color, high and low-pressure sodium lamps, and metal halide lamps. Installation methods include cantilever, suspension, and multi-lamp combinations.
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