MORE EFFECTIVE ILLUMINATED TUNNELS
The increasing transportation networks and traffic density also led to an increase in the number of tunnels and underpasses. Tunnels are transportation connections preferred sometimes to avoid the evident effects of traffic and sometimes to avoid damage to the natural environment.
Due to the closed nature of tunnels, there will be restrictions when applying maintenance at a specific point in the tunnel and also tunnels are quite damaging in terms of atmospheric conditions. The lighting systems to be used for tunnels should be highly reliable and should not need maintenance, if possible. At this critical point, LED lighting systems provide the best solution for this requirement of tunnels.
The purpose in tunnel lighting is to ensure that the flowing traffic approaches to, passes through and leaves, the tunnel with a lighting not lighter than the lighting available on the roads near to the tunnel, in a safe and comfortable manner both at night and day time with "Tunnel Lighting Design Speed". Due to the characteristics of tunnels, there will be speed limits at tunnels, but here the purpose is to ensure a smooth traffic flow independent of the speed.
The lighting plays a vital role during daytime where the adaptation of our eyesight from light to the darkness is at stake. A tunnel entrance which is not sufficiently and correctly lighted may cause a black hole effect on the eyes of drivers and this may lead to fatal accidents due to a reflex of sudden deceleration.
SAVING UP TO 25%
With variable power and optic options, LED tunnel lighting luminaires ensure full compliance with tunnel automation systems. With the infinite dim option, up to 25% savings in annual energy consumption can be achieved.
With the advancing LED technology, there is no need for light source change, while maintenance costs are reduced by 25%.
VISUAL ADAPTATION LEVELS OF DRIVERS
What is expected from a good tunnel lighting is the reduction or elimination of the difference between driver visual adaptation levels, which is necessary to see details of the road inside or outside the tunnel.
The hours of daylight are the most critical hours for tunnel lighting, as the human vision system cannot recognize the space-related details at the same time in the different brightness levels as the outside a tunnel, which is bright, and relatively inside a tunnel, which is not bright. Even though the vision system is able to adapt to the high declines that occur when the environment is illuminated, such as when entering the tunnel darkness from daylight, this process takes a variable amount of time depending on the magnitude of the decline.
A larger difference between levels of illumination refers to a longer duration of eye adaptation. Any given speed means a bigger difference between in-tunnel and external environmental levels, while it means the decreased sensitivity in the distance he drives in the driver's vision system.
Our LED tunnel lighting luminaires are fully compatible with variable tunnel automation systems with Dali and 1-10V dim options compared to conventional lighting products and the closest measurement values to the theoretical luminous flux can be achieved.