Maintained illuminance according to DIN EN 13201
Lighting values for public roads according to M, P and C illumination classes
L
Maintained illuminance of the average luminance on the carriageway, below which illuminance must not fall at any time.
Ē
Maintained illuminance of the average degree of illuminance on the carriageway, below which illuminance must not fall at any time.
Emin
Maintained illuminance of the minimum degree of illuminance on the carriageway.
U0
Total uniformity, relationship between the lowest luminance (or degree of illuminance) and the average value on the surface of the carriageway.
Ul
Longitudinal uniformity, relationship between the lowest and the highest luminance on the centre line of a traffic lane.
fTl
Increase in threshold value, measure of the loss of visibility of a visual object as a result of physiological glare caused by excessively bright luminaires.
REI
Environment illuminance ratio to improve spatial orientation, so that the areas beside the carriageway, if not illuminated themselves, are still recognisable.
for pedestrian and cyclist areas
according to illumination classes P, HS, SC and EV
Horizontal illuminance (Eh)
Semi-spherical degree of illuminance (Ehs)
Half-cylinder (Ehz) and vertical (Ev) degree of illuminance
“Lighting of pedestrian crossings with additional lighting”
In DIN EN 13201-2 the pedestrian crossing is treated in the appendix, and at the same time reference is made to the national standards of individual countries. For Germany, compliance with the guidelines for the construction and equipment of pedestrian crossings (R-FGÜ 2001) and DIN 67523 “Lighting of pedestrian crossings (sign 293 of the German Road Traffic Ordinance StVO) with additional lighting is required: If the existing road lighting does not reach the values required by the standards, additional, permanent illumination must be installed. For the uniform evaluation of the illumination in the region of pedestrian crossings, a rectangular horizontal evaluation field is defined.
- A minimum maintained illuminance of 30 lx (mean vertical illuminance) must be achieved at fixed points on the central axis at a height of 1m.
- The value must not fall below 4 lx (minimum vertical illuminance) at any of the evaluation points defined in the evaluation field, nor in the waiting zone at a distance of 1 m from the road.
The illumination must illuminate the pedestrian crossing and the adjacent waiting zones “in the respective direction of travel” – illumination directly over the centre axis of the crossing is not permitted. A light colour that differs from the general street lighting increases awareness. Unlike street lighting, the illumination at the pedestrian crossing must not be switched off during the hours of darkness. 100 m before and after the pedestrian crossing, the luminance of the road must be at least 0.3 cd/m². The level of existing street lighting should be increased accordingly, if necessary. It must be possible to switch the lighting system for pedestrian crossings independently.