Expressway tunnels can be seen literally as a road tunnel that is being built. The significance of this is to improve the area's economy. In addition to improving the area's economy, it can also improve driver's driving conditions and shorten the distance between vehicles. Save transportation costs, but also protect the ecological environment. When we took the train, the tunnel was dark and the highway tunnel was the same, so it needed special lighting system facilities.
During the day, the driver enters the tunnel from outside the tunnel. Due to the great difference in brightness between the inside and the outside of the tunnel, the driver is lagging behind in the tunnel because of the lagging effect of the human eye, and immediately creates a visually blind area. Therefore, a gentle lighting section should be set at the tunnel entrance. Whether it is daytime or dark days, the road environment within the tunnel and its impact on the visual appearance of the traffic are different from the general road sections. Because the exhaust gas removed from the tunnel during driving is almost impossible to dissipate, a large amount of smoke clusters will be formed later. In addition to absorbing the light of the car, the smoke group will reduce the visibility and cause scattering of light. The effect is to reduce the illuminance of the obstacles in front of the road and the surrounding environment (such as roads and walls), so that the visual ability of the driver to recognize the obstacles in front is reduced. The setting of the lighting exit, when the driver is approaching the exit, presents a white hole in front of him and creates a visual blind spot. Like the entrance, a transition zone must be set at the exit to increase the vertical illumination.
With the development of the lighting technology and the development of automatic control technology, extensive distribution of lighting detection instruments in tunnel tunnels will effectively monitor the actual brightness in the tunnel. The control system will promptly give an alarm when the lamp is damaged or the brightness in the hole is not enough. The appearance of automatic dimming technology is to continuously dim the lamps on the basis of the automatic classification control. The lamps emit strong light with different brightness, which will overcome the weakness of the lighting uniformity and meet the requirement of continuous dimming.
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