I remember that the viaduct was just beginning to appear in the city's residential buildings. It was in the 1990s. The traffic in the rumble was so close to the window that people were scared and surprised, but how many years passed, and after the night fell, the lights in the house were over. The brightly lit picture on the viaduct that runs through it has always been evidence of "our life is sweeter than honey." 
From simple to walk, you can see it, to safety corners, noise is minimized, the light environment is most effective, and the bridge looks good..... After all, smart people dominate the earth, and today, The viaduct, along with the light on the bridge, is constantly iterating. In addition to “lookingâ€, there is also a need to “be seenâ€, and it seems that we really see that our lives are sweeter than honey.
Good lighting is not simply to install the best luminaires together. It is not simply to make the lighting space brighter and more colorful. It is necessary to pay attention to the different requirements of product characteristics and appearance for each occasion and every environment. The combination of a product that best suits the site, expresses the effect of the light in the most reasonable way, and truly feels the comfort and beauty in the environment, which is the core of the lighting application.
The urban elevated, interchange, highway entrance and exit turns ramps and bridges connecting the tunnels, because the road conditions are complex and variable, belong to the high-risk sections of the highway. In many places, the lighting effect is very poor, and even without any lighting measures, driving safety is not guaranteed. Most of these elevated ramps now use high-beam and mid-bar lighting, which is inconvenient to install and maintain. It is resistant to typhoon and energy consumption. It is also frequently complained by the surrounding residents due to serious glare pollution. The most important thing is: it destroys the beautiful and harmonious of the interchange. And unity.
Let's take a look at some common types of overpasses, viaducts, and ramps:
1, high pole street lighting
The most domineering solution, the favorite of the squares in the previous city, is more common in the place where the viaducts are connected and connected, hanging a "sun", illuminating all places to the greatest extent possible.
Advantages: Concentrated lines and easy maintenance of lift poles.
Disadvantages: large glare, serious light pollution (very well understood, angles can not take into account all directions), poor induction; installation is not convenient.
2, the pole street lighting
The road was taken care of from the “big pot rice†subdivision.
Advantages: Classic traditional practices, users have become accustomed (why this is an advantage? Do you like it?), single-story bridge lighting is more uniform.
Disadvantages: The poles are erected, the light pollution is serious, the effect is beautiful, the illumination is uneven when the layers are superimposed, and the installation and maintenance are inconvenient.
Looking far away, I thought the viaduct was in acupuncture.
Picture: The light environment of the road surface is indeed very evenly taken care of.
3, landscape lighting digital contour lights
This gadget appeared when the city began to pursue a “lighting landscape†on a large scale. Strictly speaking, the pursuit of "being seen" is more than "looking". At this time, it also triggered the aesthetic needs of the elevated bridge night scene in addition to the function.
Advantages: low price and simple design.
Disadvantages: easy to age and discoloration, electrical box separation, aesthetic and safety are affected, easy to break and deform.
4, low-altitude lighting steel pipe guardrail street light
The micro-classroom has repeatedly recognized this solution in the article or text of the lighting scene design. The difference is that the degree of marketization is not high, and perhaps once again the "user has become accustomed" in the second point. ".
Advantages: It not only illuminates the road surface, but also guarantees the landscape, and the induction effect is better. The road lighting function, the landscape lighting function, and the guardrail collision avoidance function are combined into one.
Disadvantages: One-way three-way or more is not suitable for use. If the lighting is not good, there will be glare.
Photo: The actual installation effect of the Chongqing Fuling Yangtze River Bridge Interchange.
Application comparison: comparison of traditional street lights with low-altitude lighting
The disadvantages of high pole and middle pole lights applied to the viaduct:
1. The poles are erected, which will affect the landscape during the day and night;
2. The lights between the upper span bridge and the underpass road cross each other and are prone to glare;
3, multi-layer street lights are superimposed, so that the road surface brightness is uneven;
4. When repairing street lights, special maintenance vehicles are required;
5. Most of the light is outside the road surface, causing light pollution and energy waste;
Advantages of low-altitude streetlights:
1. Do not increase the ancillary facilities and not destroy the complete coordination of the architectural landscape;
2, multi-functional combination: a single product to solve road lighting, landscape lighting and road protection.
3, directional lighting, wired and orderly linear arrangement to ensure driving guidance and safety;
4. No light pollution: strictly control the direction of lighting, do not disturb the people, and do not affect the light environment;
5. No need for large-scale mechanical cooperation, only simple tools to achieve maintenance and repair;
Other examples of low-altitude lighting:
Photo: Guangzhou South Railway Station
Photo: Nanjing South Railway Station
Photo: Huanghua Airport
Photo: Xining Airport
Photo: Zhejiang Paojiang Bridge
Trend speculation: bridge modeling lighting is completely differentiated from pavement functional lighting
From the above-mentioned viaduct (or bridge) light solution and development, combined with the scene design of the luminaire, it is not difficult to see that the development of the luminaire closely combined with the scene application is an inevitable result, and this result will directly lead to the bridge. The architectural performance and functional applications are completely differentiated.
To put it simply, there are lights that are specifically responsible for the bridge's good looks, lights that are specifically responsible for clear roads, and both of which are becoming more and more professional.
Figure: Xu Dongliang Bridge Lighting Design Manuscript: For the architectural aesthetics of the bridge, an in-depth interpretation of the aesthetics of the building structure is required. This is separate from the pavement lighting of the bridge and should belong to the category of “public artâ€.
Picture: Xu Dongliang's work, Suyang Bridge rendered by RGBW color-changing floodlights , like a steel backbone beam arched in the desert, a cable-stayed cable, like a dancer.
The bridge of this angle is a sculpture, and there should be a dedicated lighting solution; at this time, the lighting on the bridge surface belongs to another field.
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