We check the proper execution of the lighting systems for you.

Here is an excerpt from the norms of the countries:

Germany:

DIN 67542 part 1-4

DIN 13201

EABT 2016 (formerly RABT)

ZTV-ING

Austria:

RVS

Planning manual of ASFINAG

Switzerland:

International:

CIE 88

some lighting technology:

The luminance Lv (English luminance) provides detailed information about the location and direction dependence of the emitted light from a light source. The luminance of a surface determines with which surface brightness the eye perceives the surface and therefore has the most direct relation to the optical sensory perception of all photometric quantities. The luminance describes the brightness of extended, areal light sources; For the description of the brightness of punctiform light sources, the light intensity is better suited. (Source Wikipedia)

The illuminance Ev (English illuminance) or luminous flux density describes the surface-related luminous flux that strikes an illuminated object. You stand opposite the light intensity, which describes the spatial angle-related luminous flux of a light source.

Lighting has the task of making non-self-luminous objects (better) visible. This lighting systems are required, which in turn shortened also like to be called as lighting (instead of lighting system). Lighting systems use light sources to produce light that can be described by the photometric quantities of luminous flux and luminous intensity. This light, after leaving its source, spreads in space and strikes objects. The illuminance Ev describes what proportion of the luminous flux arrives on a square meter of the illuminated object.

The SI unit of illuminance is lux (lx, from latin lux, light) - equivalent to lumens by square meters (lm / m2). In the Anglo-American measurement system, in particular in North America, the unit foot-candle (fc) is used, which relates the luminous flux, expressed in the unit candela (cd), to one square foot (sq ft). 1 fc corresponds to about 10.764 lux. (Source Wikipedia)

On the basis of the above information, it is not difficult to recognize the great influence that a surface has on the luminance of the road surfaces. A lighting system can therefore not be judged primarily on the luminance, but rather on the interaction of illuminance, light exit angle and reflection properties of the surfaces on which the light impinges.

There are currently about 330 road tunnels in Germany with a total length of over 260 km. Each tunnel is individual and requires its own planning. In the first step, the so-called "L20 method" first determines which entry luminance a tunnel generally requires. The speed (stopping sight), the structural design of the tunnel portal and, above all, the environment play a decisive role here.

A need-based and economical tunnel lighting is therefore based on the following factors:

speed

Design of the portal and the walls

Switching

For planning and design, we recommend specialist planning offices for tunnels, here we would like to give you corresponding addresses.