Страница 4: ДСТУ CEN/TR 13201-1:2016. Road lighting — Part 1: Guidelines on selection of fighting classes (62747)

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* see Figure Bl

ф Cunent possible case

PRODUCT OF THE COEFFICIENTS OF TABLE B1

Figure B.1 — Selection of M or C lighting class versus the overall coefficient of Table B.1B.3 Lighting classes for pedestrian and low speed areas

The lighting classes P are intended predominantly for pedestrians and cyclists on footways and cycleways, and drivers of motorised vehicles at low speed on residential road, shoulder or parking lanes, and other road areas lying separately or along a carriageway of a traffic route or a residential road, etc.

The visual tasks and needs of pedestrians differ from those of drivers in many respects. Speed of movement is generally much lower and relevant objects to be seen are closer than those important for drivers of motorised vehicles. This is reflected in the parameters and associated options for the selection of a lighting class P for a pedestrian or low speed area as listed in Table B.2.

The application of these classes depends on the geometry of the relevant area and the traffic and time dependant circumstances.

Table B.2 and Figure B.2 are based on the same principle as C classes: the level of performance is the average maintained illuminance whose scale is adapted to the P class.

This document does not give guidelines on the selection of lighting classes HS, SC and EV. The decision on whether these classes should be used for pedestrians and low speed areas is defined in the national road lighting policy and the code of practice for road lighting. This varies by country or municipality. Specific guidelines on the selection of lighting classes HS, SC, EV and the use of facial recognition parameter are available at national level for each country.Table B.2 — Selection of P lighting class from the road characteristics

U

see Figure 82

• Current possible case

Figure B.2 — Determination of P class versus the overall coefficient of Table B.2

B.4 Example of use of Table B.1 and Figure B.1

In the following page, on Table B.3 and Figure B.3 are drawn arrows showing the search process of the M class number for a “main urban road” during two periods of the night.

First case (continuous lines) the determination with high traffic volume corresponding to rush hours: the overall coefficient is 42 (A x В x C = 42) on Line III cumulating the high conditions of “ambient light" and “mental load task” of drivers. Class М2 is defined with the average maintained luminance of 1,7 cd.m-2.

Second case (dotted lines), the same determination but with a lower traffic volume and a “normal” mental load task of drivers. The overall coefficient is 23 (A x В = 23) on Line II, keeping high the “ambient light” parameter.

Class M4 is defined with the average maintained luminance of 0,95 cd.m-2. This second case is a possibility of adaptive lighting of the first one at another period of the night, for example : from the end of evening rush hour until midnight.Table B.3 — Determination of the M class of a “main urban road” for two traffic volumes with and without mental task load