Standard for lighting design of urban road

1. General

1.0.1 In order to ensure that street lighting creates a good visual environment for drivers and pedestrians of various vehicles, to achieve the purpose of ensuring traffic safety, improving transportation efficiency, facilitating people's lives, meeting public security needs, and beautifying the urban environment standard. 

1.0.2 This standard applies to the lighting design of newly built, expanded, and rebuilt urban roads and road-related places. 

1.0.3 The design of led roadway lights should be carried out in accordance with the principles of safety and reliability, advanced technology, economical and reasonable, energy-saving and environmentally friendly, and convenient maintenance. 

1.0.4 In addition to the road lighting design should comply with this standard, it should also comply with the current relevant national standards.

2. Terminology and symbols

2.1 Terminology

2.1.1 Conflict areas Areas such as road exits, intersections, and crosswalks. In this area, collisions between motor vehicles, motor vehicles, and non-motor vehicles or pedestrians, and vehicles and fixed objects are more likely to be collisions. 

2.1.2 Boundary line of road construction The space boundary is formed by the clear height line on the road and the lateral clear width line on both sides of the road. 

2.1.3 Conventional Road lighting The luminaire is installed on a light pole whose height is usually less than 15m, and is arranged regularly and continuously on one side, two sides of the middle partition of the road at a certain interval for lighting. When using this lighting method, the longitudinal axis of the luminaire is perpendicular to the road axis, and most of the light emitted by the luminaire is directed toward the longitudinal axis of the road. 

2.1.4 High mast lighting group of lamps are installed on a pole with a height greater than or equal to 20m to illuminate a large area. 

2.1.5 Semi-high mast lighting group of luminaires are installed on a light pole with a height of 15m to 20m for lighting. The luminaires can be configured according to the conventional lighting method or the high-pole lighting method. It is usually used for lighting in places such as road junctions. 

2.1.6 Parapet lighting The lamps are installed in relatively low railings or anti-collision walls (the height is generally about 1m) and is used to illuminate the road or play a guiding role. 

2.1.7 Cut-off luminaire The angle between the maximum light intensity direction of the lamp and the downward vertical axis of the lamp is between 0° and 65°, and the maximum allowable value of the light intensity in the 90° angle and 80° angle direction is 10cd/1000lm and 30cd/1000lm, respectively, regardless of the size of the luminous flux of the light source, the maximum light intensity in the 90° angle direction does not exceed 1000 cd. 

2.1.8 Semi-cut-off luminaire The angle between the direction of the maximum light intensity of the lamp and the downward vertical axis of the lamp is between 0° and 75°, and the maximum allowable value of the light intensity in the direction of 90° and 80° is 50cd/1000lm and 100cd/1000lm respectively, regardless of the size of the luminous flux of the light source, the maximum light intensity in the 90° angle direction does not exceed 1000 cd. 

2.1.9 Non-cut-off luminaire The maximum light intensity direction of the lamp is not limited, and the maximum light intensity in the 90° angle direction does not exceed 1000cd. 

2.1.10 floodlight The light beam spread angle (the angle between the two directions where the light intensity is 1/10 of the peak light intensity) is greater than 10°, and the lamps used for floodlighting usually can be rotated and the irradiation direction is directed to any direction. 

2.1.11 luminaire efficiency Under the same conditions of use, the ratio of the total luminous flux emitted by the lamp to the total luminous flux emitted by all the light sources in the lamp is also called the light output ratio of the lamp. 

2.1.12 luminous efficacy of luminaire Under the specified conditions of use, the ratio of the total luminous flux emitted by the lamp to its input power. The unit is lumens per watt (lm/W). 

2.1.13 maintenance factor After the lighting device is used for a certain period, the ratio of the average illuminance or average brightness on the specified surface to the average illuminance or average brightness on the same surface when the device is newly installed under the same conditions. 

2.1.14 maintenance factor of lamp luminous flux The ratio of the luminous flux of a light source at a given point in its lifetime to the initial luminous flux. 

 2.1.15 chromaticity The color properties are represented by the International Commission on Illumination (CIE) standard colorimetric system; the color stimulus properties are defined by the chromaticity coordinates. 

2.1.16 chromaticity coordinates The ratio of each tristimulus value to its total. In the X, Y, and Z chromaticity system, the color coordinates, y, and z are calculated from the three stimulus values. 

2.1.17 chromaticity tolerance Characterize the deviation of each light source in a batch of light sources from the rated chromaticity or average chromaticity of the light source, expressed by the standard deviation of color matching (SDCM). 

2.1.18 luminaire mounting height The vertical distance from the light center of the luminaire to the road surface. 

2.1.19 luminaire mounting spacing The distance between two adjacent lamps was measured along the centerline of the road. 

2.1.20 overhang length The horizontal distance from the light center of the lamp to the edge stone on the adjacent side, that is, the horizontal distance that the lamp extends or retracts into the edge stone. 

2.1.21 Bracket projection The horizontal distance from the vertical centerline of the lamp pole to the point where the lamp arm is inserted into the lamp. 

2.1.22 effective road width The theoretical width of the road surface used for road lighting design is related to the actual width of the road, the overhang length of the lamps, and the arrangement of the lamps. When the lamps are arranged on one side, the effective road width is the actual road width minus a cantilever length. When the lamps are arranged on both sides (including staggered and opposite), the effective width of the road is the actual road width minus the two cantilever lengths. When the lamps are arranged symmetrically in the center of the double-width road, the effective width of the road is the actual width of the road. 

2.1.23 Inductive guidance Appropriate installation of light poles and lamps along the road can provide drivers with visual information such as the direction, line type, and slope of the road ahead. It is an evaluation index for road lighting facilities. 

2.1.24 average road surface luminance The average value of the brightness of each point is measured or calculated at a predetermined point on the road according to the relevant regulations of the International Commission on Illumination (CIE). 

2.1.25 overall uniformity of road surface luminance The ratio of the minimum brightness to the average brightness on the road. 

2.1.26 Longitudinal uniformity of road surface luminance The minimum value of the ratio of the minimum brightness to the maximum brightness on the centerline of each lane on the road. 

2.1.27 average road surface illuminance The average value of the illuminance measured or calculated at the predetermined points on the road surface according to the relevant regulations of the International Commission on Illumination (CIE). 

2.1.28 uniformity of road surface illuminance The ratio of the minimum illuminance to the average illuminance on the road. 

2.1.29 Maintained average luminance (illuminance) of road surface That is, the average brightness (illuminance) of the road surface is maintained. It is the average brightness (illuminance) value used in the design calculation after considering the attenuation of the light flux in the planned replacement of the light source and the reduced efficiency of the lamp due to pollution (ie, the maintenance factor). 

2.1.30 Upward light ratio of lamps and lanterns When the luminaire is installed in place, the luminous flux emitted from the horizontal direction and above accounts for the percentage of the total luminous flux emitted by the luminaire. 

2.1.31 Glare A visual state of discomfort or reduced ability to observe objects or details due to the unsuitable brightness distribution or brightness range in the visual field, or the presence of extreme contrast. 

2.1.32 Disability glare Reduces the visibility of visual objects but does not necessarily produce an uncomfortable glare. 

 2.1.33 Threshold increment A measure of disability glare. It is expressed as the percentage that the brightness contrast between the object and its background needs to be increased to achieve the same purpose of seeing the object clearly when there is a glare source. 

2.1.34 Surround ratio The ratio of the average horizontal illuminance in the band-shaped area outside the curbstone to the average horizontal illuminance on the same width motor lane inside the curbstone. The width of the belt-shaped area shall be the smaller of the half-width of the motor vehicle road and the width of the unobstructed belt-shaped area outside the curb of the motor vehicle but shall not exceed 5m. 

2.1.35 Semicylindrical illuminance The illuminance produced by the light source on the curved surface of an imaginary small half-cylinder at a given point in space. The axis of the cylinder is usually vertical, and the orientation of the semi-cylinder is the inner normal direction of the flat back of the semi-cylinder. The calculation method is the total luminous flux falling on the semi-cylindrical surface divided by the surface area. 

2.1.36 Lighting power density Lighting installation power per unit road area (including the power of the light source and the power consumption of the electrical accessories of the lamp). 

2.1.37 Remote terminal unit The sub-station monitored by the master station is a device that completes the functions of remote data collection, processing, sending, receiving, and output execution according to the protocol. 

2.1.38 surge A transient wave of current, voltage, or power transmitted along a line or circuit is characterized by a rapid rise first and then a slow fall. The electromagnetic induction caused by lightning and other factors causes a transient overvoltage in the power transmission loop of the power grid, which in turn causes a large inrush current to electrical equipment. 

2.1.39 average load coefficient The ratio of the apparent power output by the transformer to the rated capacity of the transformer within a certain period. 

2.1.40 optimal economical operation area The load range where the comprehensive power loss rate is close to the economic load factor of the transformer.

2.2 Symbols

Eh, av-----------average illuminance of the road surface. 

Eh, min-----------the minimum illuminance of the road surface. 

Esc, min-----------Minimum semi-cylindrical illuminance; 

Ev, min-----------minimum vertical illuminance. 

H-----------The installation height of lamps and lanterns. 

Imax-----------Maximum light intensity. 

Lav-----------average brightness of the road surface; s-installation distance of lamps and lanterns. 

SR-----------environment ratio. 

TI-----------threshold increment. 

UE-----------road surface illumination uniformity. 

UL-----------Longitudinal uniformity of road surface brightness. 

UO-----------total uniformity of road surface brightness. 

Weff-----------effective width of the pavement. 

Bjf-----------comprehensive power economic load factor.

3. Lighting standards

3.1 Street lighting classification

3.1.1 According to road usage functions, urban road lighting can be divided into motor vehicle lane lighting and intersection area lighting mainly for motor vehicles and sidewalk lighting mainly for pedestrians. 

3.1.2 Motor vehicle lane lighting should be divided into three levels according to expressway and the main road, sub-main road, and branch road. 

3.1.3 Pedestrian street lighting should be divided into four levels according to traffic flow.

3.2 City street lighting evaluation indicators

3.2.1 Motor vehicle lane lighting should use average road surface brightness or road average illuminance, total road surface brightness uniformity and longitudinal uniformity or road surface illumination uniformity, glare limit, environmental ratio, and inducement as evaluation indicators. 

3.2.2 The lighting of the intersection area should use the average road surface illuminance, road surface illuminance uniformity, and glare limit as evaluation indicators. 

3.2.3 Sidewalk lighting and non-motor vehicle lane lighting should use average road surface illuminance, minimum road illuminance, vertical illuminance, semi-cylindrical illuminance, and glare limit as evaluation indicators.

3.3 Standard values of motor vehicle lane lighting

3.3.1 The lighting standard values of the motor vehicle lanes with continuous lighting shall meet the requirements of Table 3.3.1. 

3.3.2 According to the average brightness coefficient in Appendix A of this standard, calculate the average illuminance required on the asphalt pavement and cement concrete pavement to obtain the average brightness of the pavement. 

3.3.3 When calculating the maintenance average brightness or the maintenance average illuminance of the road surface, the maintenance coefficient shall be determined in accordance with Article 4.2.9 of this standard 

Table 3.3.1 Standard values of motor vehicle lane lighting

Note: 

1. The average illuminance listed in the table only applies to asphalt pavements. If it is a cement concrete pavement, the average illuminance value will be reduced by about 30%. 

2. The values in the table only apply to dry roads. 

3. The table provides two standard values for the average brightness and average illuminance of each level of the road. The left side of "/" is the low-grade value, and the right side is the high-grade value. 4. Yingbin Road, the main road leading to large public buildings, the road located in the city center and the commercial center, Implement ClassⅠstandard. 

3.3.4 When designing roadway light, it should be ensured that it has good inducement. 

3.3.5 The lighting standard value of roads of the same level shall be determined according to the size of the traffic flow and the speed of the vehicle, as well as the degree of perfection of the traffic control system and road separation facilities. When the traffic volume is large or the vehicle speed is high, the high-end value in Table 3.3.1 of this standard should be selected; for roads with complete traffic control systems and road separation facilities, the low-end value in Table 3.3.1 of this standard should be selected. 

3.3.6 The auxiliary roads of express roads and main roads that are only for motor vehicles or are mixed with non-motorized vehicles shall have the same lighting level as the adjacent main roads; auxiliary roads that only drive non-motorized vehicles shall comply with this standard The standard of Article 3.5.2.

3.4 Standard value of lighting in the intersection area

3.4.1 The lighting standard values of the intersection area shall meet the requirements of Table 3.4.1. 

Table 3.4.1 Standard value of lighting in the intersection area 

Note: 

1 The height angle of the luminaire is measured under the on-site installation and use posture. 

2 Two standard values are given in the table for the average road surface illuminance of each type of road intersection. The left side of "/" is the low-grade illuminance value, and the right side is the high-grade illuminance value. 

3.4.2 When the intersecting road has a low-grade illuminance value, the corresponding intersection area should choose the low-grade illuminance value in Table 3.4.1 of this standard, otherwise the high-grade illuminance value should be selected.

3.5 Standard values of pedestrian and non-motorized vehicle lane lighting

3.5.1 The lighting standard values of roads mainly used by pedestrians and non-motor vehicles should meet the requirements of Table 3.5.1-1, and the glare limits should meet the requirements of Table 3.5.1-2. 

Table 3.5.1-1 Pedestrian and non-motorized vehicle lane lighting standard values 

Note: The calculation points or measurement points of the minimum vertical illuminance and semi-cylindrical illuminance are located at a height of 1.5m from the road surface on the centerline of the road. The minimum vertical illuminance needs to be calculated or measured in the two directions on the plane perpendicular to the road axis through the point. 

Table 3.5.1-2 Pedestrian and non-motor vehicle lane lighting glare limits 

Note: The luminous intensity given in the table is the luminous intensity in any direction at the specified angle formed by the downward vertical axis of the lamp after it is installed in place.

3.5.2 The lighting of non-motor vehicle lanes that are installed on one or both sides of the motor vehicle lane and that are not physically separated from the motor vehicle lane shall comply with the lighting standards of the motor vehicle lane; the average illuminance of the non-motor vehicle lane that is physically separated from the motor vehicle lane should be adjacent The illuminance value of the motor vehicle lane is 1/2, but it should not be less than the illuminance of the adjacent sidewalk (if any). 

3.5.3 For the pedestrian street lighting installed on one or both sides of the motor vehicle lane, when the sidewalk is mixed with the non-motor vehicle lane, the pedestrian road lighting standard should be adopted and meet the environmental ratio requirements of the motor vehicle road lighting. When the sidewalk is separated from the non-motorized vehicle lane, the average illuminance of the sidewalk should be 1/2 of the adjacent non-motorized vehicle lane. At the same time, sidewalk lighting should also implement the provisions of Article 3.5.1 of this standard. When the standard values determined according to the two requirements are inconsistent, the high standard value should be selected.

4. Selection of light source, lamps, and accessories

4.1 Light source selection

4.1.1 The selection of the light source should meet the following requirements: 

1 High-pressure sodium lamps should be used for express roads and main roads, and light-emitting diode lamps or ceramic metal halide lamps can also be selected. 

2 The secondary main circuit and branch circuit can choose a high-pressure sodium lamp, light-emitting diode lamp, or ceramic metal halide lamp. 

3 Light-emitting diode lights or metal halide lights should be used on mixed traffic roads of motor vehicles and pedestrians in residential areas. 

4 Light-emitting diode lights or metal halide lights can be used on motor vehicle traffic roads with high color recognition requirements such as downtowns and commercial centers. 

5 Light-emitting diode lights, low-power metal halide lights or thin-tube fluorescent lights, compact fluorescent lights can be used on pedestrian streets in commercial areas, pedestrian roads in residential areas, sidewalks on both sides of motor vehicle traffic roads, or non-motorized vehicle lanes. 

4.1.2 High-pressure mercury lamps and incandescent lamps should not be used for road lighting. 

4.1.3 When using light-emitting diode (LED) light sources, the following requirements should be met: 

1 The color rendering index (Ra) of the light source should not be less than 60. 

2 The correlated color temperature of the light source should not be higher than 5000K, and the medium or low color temperature light source should be preferred. 

3 The chromaticity tolerance of the same type of light source should not be greater than 7SDCM. 

4 In the CIE1976 uniform chromaticity scale chart specified in the current national standard "Uniform Color Space and Color Difference Formula" GB/T 7921, the deviation of the chromaticity coordinates of the light source from the initial value during the life cycle should not exceed 0.012.

4.2 Selection of lamps and accessories

4.2.1 The motor vehicle lane lighting must use functional lamps, and the luminosity parameters of the lamps should be selected according to the lighting level, road form, and road width. 

4.2.2 Commercial pedestrian streets, sidewalks, pedestrian underpasses, pedestrian bridges, and non-motorized vehicle lanes and sidewalks on both sides of motor vehicle traffic roads that need to be separately illuminated, on the premise that they meet the lighting standard values, they should be coordinated with the road environment. A combination of functionality and decoration. When decorative lamps are used, their upward luminous flux ratio should not be greater than 25%, their glare control value should meet the relevant requirements of this standard, and the mechanical strength should comply with the current national standard "Lamps Part 1: General Requirements and Tests" GB7000 .1 and "Luminaires Part 2-3: Special Requirements for Road and LED Street Light Luminaires" GB 7000.203. 

4.2.3 When high pole lighting is used, floodlights or cut-off lamps with appropriate power and light distribution should be selected according to the characteristics of the place. 

4.2.4 For enclosed road lighting fixtures equipped with high-intensity gas discharge lamps, the protection level of the light source cavity shall not be lower than IP54. For roads and places with serious environmental pollution and difficult maintenance, the protection level of the light source cavity should not be lower than IP65. The protection level of the electrical cavity of the lamp shall not be lower than IP43. 

4.2.5 Areas or places with high levels of corrosive gases such as acid and alkali in the air should use lamps with good corrosion resistance. 

4.2.6 In places prone to strong vibrations such as large bridges for passing motor vehicles, the lamps used should comply with the current national standard "Lamps Part 1: General Requirements and Tests" GB 7000.1 and "Lamps Part 2-3: Special Requirements" Road and best street light" GB 7000.203 stipulates the anti-vibration requirements, and an anti-falling device should be installed. 

4.2.7 High-intensity gas discharge lamps should be equipped with energy-saving inductive ballasts, and light sources with lower power can be equipped with electronic ballasts. 

4.2.8 The installation distance between the trigger and ballast of the high-intensity gas discharge lamp and the light source should meet the requirements of the current relevant national product standards. 

4.2.9 The maintenance coefficient of outdoor led street light can be determined according to Table 4.2.9 

Table 4.2.9 Maintenance Coefficient of Road Lighting Fixtures

4.2.10 When the luminaire adopts an LED light source, it shall meet the following requirements:

1 The power factor of the lamp should not be less than 0.9. 

2 The efficiency of the luminaire should not be less than the requirements of Table 4.2.10. 

Table 4.2.10 Lamp performance limit (lm/W) of LED Lamps

3 In the nominal working state, the maintenance rate of the light source luminous flux of the lamp for 3000 hours of continuous ignition should not be less than 96%, and the maintenance rate of the light source luminous flux of the lamp for 6000 hours of continuous ignition should not be less than 92%. 

4 The power supply module of the lamp should meet the requirements of the current national standard "Lamp control device Part 14: Special requirements for DC or AC electronic control devices for LED modules" GB19510.14 and can be replaced on-site. The protection level should not be reduced. 

5 The radio disturbance characteristics of the lamps should meet the requirements of the current national standard "Limits and Measurement Methods of Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment" GB 17743, and the harmonic current limit should comply with the current national standard "Electromagnetic Compatibility Limits Harmonic Current" Emission limit (equipment input current per phase≤16A)" GB 17625.1 requirements, electromagnetic compatibility immunity should comply with the current national standard "Electromagnetic compatibility immunity requirements for general lighting equipment" GB/T 18595; 

6 The protection level of the lamp should not be lower than IP65. 

7 The lamp power supply should pass the national compulsory product certification.

4.3 Video of SE Series LED Street Light

4.4 Download of Specification and Installation Manual of SE series LED Street Light

Specification_SE_LED Street Light.pdf

Installation Manual_StreetLight_SE.pdf

4.5 What is the price of led street light?

Take SE street light as an example

The above prices are estimated prices, if you want an accurate quotation, please contact the MKLIGHTS team

5. Lighting methods and design requirements

5.1 Lighting method and selection

5.1.1 According to the characteristics and lighting requirements of roads and places, choose conventional lighting, half-height pole lighting, or high pole lighting for road lighting design. 

5.1.2 Any road lighting facilities shall not invade the road-building boundaries. 

5.1.3 The arrangement of conventional lighting fixtures can be divided into five basic ways: single-sided arrangement, double-sided staggered arrangement, bilateral symmetrical arrangement, center-symmetrical arrangement, and lateral suspension cable arrangement (Figure 5.1.3). When using conventional lighting methods, it should be selected according to the road cross-section form, road width, and lighting requirements, and should meet the following requirements: 

1 The cantilever length of the luminaire should not exceed 1/4 of the installation height, and the elevation angle of the luminaire should not exceed 15°. 

2 The arrangement, installation height, and spacing of the lamps can be determined after calculation in accordance with Table 5.1.3. 

Figure 5.1.3 Five basic ways to arrange conventional lighting fixtures 

(a) One-sided layout. 

(b) Staggered arrangement on both sides. 

(c) Symmetrical arrangement on both sides. 

(d) Center symmetrical arrangement. 

(e) Horizontal suspension cable arrangement 

Table 5.1.3 The relationship between the light distribution type and arrangement of the lamps and the installation height and spacing of the lamps 

5.1.4 When using high-pole lighting, the lamps and their configuration, the position, height, spacing, and aiming direction of the maximum light intensity, etc., shall meet the following requirements: 

1 According to the situation of the site, the luminaire configuration modes of plane symmetry, radial symmetry, and asymmetrical can be selected (Figure 5.1.4). The high-pole lights arranged on wide roads and the periphery of large-area venues should adopt a plane symmetrical configuration; the high-pole lights arranged in the interior of the venue or the three-dimensional intersection with a compact driveway layout should adopt the radial symmetrical configuration; the layout of the multi-level large-scale interchange should be used. Or the three-dimensional crossing high-pole lights with scattered lane layout should adopt asymmetrical configuration. For various luminaire configurations, the distance between the poles and the height of the poles should be determined by calculation according to the luminosity parameters of the lamps. 

2 Light poles should not be installed on the side of the road where it is easy to be scratched by motor vehicles or where it will hinder traffic during maintenance. 

3 The angle between the aiming direction of the maximum light intensity of the luminaire and the vertical line should not exceed 65°. 4 The led high mast lighting installed in the environmental landscape area should be coordinated with the surrounding environment under the premise of meeting the requirements of the lighting function. 

5.1.5 The selection of road lighting methods should meet the following requirements: 

1 Conventional lighting methods shall be adopted and shall comply with the provisions of Article 5.1.3 of this standard. 

2 High-pole lighting can be used on expressways and main roads with wide roads and should comply with the provisions of Article 5.1.4 of this standard. 

3 For roads with heavy shading by street trees, horizontal suspension cable arrangement can be selected; for narrow streets where it is difficult to install light poles in the 4th-floor group area, horizontal suspension cable arrangement or wall installation can be selected. 

Figure 5.1.4 High pole lamp configuration method 

(a) Plane symmetry. 

(b) Radial symmetry. 

(c) Asymmetry

5.2 Lighting design requirements for special sections of roads and road-related places

5.2.1 The lighting of intersections should meet the following requirements: 

1 The lighting level of the intersection should meet the requirements of Section 3.4 of this standard, and the average illuminance within 5m outside the intersection should not be less than 1/2 of the average illuminance of the intersection. 

2 Intersections can use light sources with different color tables from the connected roads, lamps with different shapes, different installation heights of lamps, or different arrangements of lamps. 

3 The lamps at the crossroads can be arranged on one side, staggered or symmetrically according to the specific conditions and lighting requirements of the road, and the lamps on the poles should be added according to the road lighting needs. Large-scale intersections can be equipped with additional lighting. The additional lighting can be conventional lighting or half-height pole lighting, and glare should be limited. 

4 T-shaped intersections should be equipped with lamps at the end of the road (Figure 5.2.1-1), and the road form and structure should be displayed. 

Figure 5.2.1-1 T-shaped intersection lighting settings 

5 The lighting of roundabouts should show roundabouts, traffic islands, and curbs. When conventional lighting methods are used, the lamps should be installed on the outside of the roundabout (Figure 5.2.1-2). The lighting of the entrance and exit to each road shall meet the requirements of Section 3.4 of this standard. When the diameter of the roundabout is large, high pole lights can be installed on the roundabout, and the lamp should be selected, and the position of the light pole should be selected according to the principle that the brightness of the roadway is higher than the brightness of the roundabout. 

Figure 5.2.1-2 Roundabout lighting settings 

5.2.2 The lighting of curved road sections should meet the following requirements: 

1 For curved road sections with a radius of 1000 m and above, the lighting can be treated as a straight-line section. 

2 For curved road sections with a radius of less than 1000 m, the lamps should be arranged along the outside of the curve, and the distance between lamps should be 50% to 70% of the distance between lamps in the straight-line section (Figure 5.2.2-1). The length of the overhang should be shortened accordingly. On the reverse curve section, it is advisable to fix the lamps on one side and add additional lamps on the outside of the curve when the line of sight is obstructed (Figure 5.2.2-2). 

Figure 5.2.2-1 Lamp settings on the curved road section  Figure 5.2.2-2 Lamp settings on the reverse curve section 

3 When the road surface of the curved road section is wide and the lamps need to be arranged on both sides, the symmetrical arrangement should be adopted. 

4 The lighting at the turning point shall not be installed on the extension line of the lighting at the straight-line section (Figure 5.2.2-3). 

5 Lamps installed at sharp turns should provide adequate lighting for vehicles, curbs, guardrails, and adjacent areas. 

 5.2.3 When lighting is installed on a ramp, the light distribution symmetry plane of the luminaire in the direction parallel to the road axis should be perpendicular to the road surface. In the range of the convex vertical curve ramp, the installation distance of the lamps should be reduced, and the light-cutting lamps should be adopted. 

Figure 5.2.2-3 Lamp settings at the turn (a) incorrect; (b) correct 

5.2.4 The lighting of the overpass and underpass should meet the following requirements: 

1 When using conventional lighting, the brightness (or illuminance) produced by the lamps installed on the underpass road on the underpass road should be effectively connected with the brightness (or illuminance) produced by the lamps on both sides of the overpass road on the underpass road. The average brightness (illuminance) of the road surface in the section under the bridge under the road shall be the same as the road surface in the section outside the bridge. The lamps on the underpass road should not produce a glare on the overpass road. The average brightness (or illuminance) and uniformity of the overpass road surface should be the same as the connected road surface. Illumination should be provided for the supporting structure of the upper-span road. 

2 High-pole lightings can be used for large-scale over-span roads and under-crossing roads and should meet the requirements of Article 5.1.4 of this standard. 

5.2.5 The lighting of elevated roads should meet the following requirements: 

1 The lighting of the upper road and the lower road shall be consistent with the lighting level of the connecting road and shall meet the requirements of Article 3.3.1 of this standard. 

2 The upper and lower roads should adopt conventional lighting methods, and the isolation facilities and anti-collision walls of the road should be provided with lighting. 

3 The pavement lighting of the area under the bridge of the lower road shall not be lower than the lighting level of the pavement of the area outside the bridge. And should provide lighting for the supporting structure of the upper road. 

4 The lighting level of the ramp on the upper and lower bridge should not be lower than that of the road on the bridge. 

5 Elevated roads with multiple motor vehicle lanes should not use guardrail lighting as functional lighting. 

5.2.6 The lighting of the three-dimensional intersection shall meet the following requirements: 

1 It should provide the driver with good inducement; 

2 It should provide environmental lighting without disturbing glare. 

3 The lighting of intersections, entrances, exits, and merging areas should comply with the provisions of Section 3.4 of this standard; the lighting of complex traffic sections such as curved road sections and ramps should be strengthened. 

4 Conventional lighting can be used for small interchanges, and conventional lighting or high-pole lighting can be selected for large-scale interchanges. When high-pole lighting is used, it shall meet the requirements of Article 5.1.4 of this standard. 

5 It is not advisable to use guardrail lighting as the functional lighting for wide road interchanges. 

6 The lighting of the road on the interchange should be the same as the lighting of the connected road. 

7 The lighting level of the interchange ramp should not be lower than that of the roads on the connected bridges, and the isolation facilities and anti-collision walls should be provided with lighting. 

5.2.7 The lighting of urban bridges should meet the following requirements: 

1 The lighting of roads on small and medium-sized bridges should be consistent with the lighting of connected roads; when the width of the bridge deck is smaller than the width of the road connected to it, vertical surface lighting should be provided for the railings and curbs of the bridge, and lamps should be installed at the entrance of the bridge. 

2 The lighting of large bridges and small and medium-sized bridges with artistic and historical value should be specially designed. 

3 Bridge lighting should limit glare, and lamps with shading plates or grilles can be used. 

4 Bridges with multiple motor lanes should not use guardrail lighting as functional lighting. 

5.2.8 The lighting of sidewalks should meet the following requirements: 

1 Short straight pedestrian underpass with plenty of natural light, which can only be illuminated at night. 

2 The entrances and exits of pedestrian underpasses without streetlights should be specially equipped with lighting devices; the average horizontal illuminance on the steps should be 301x, and the minimum horizontal illuminance should be 15lx. 3 The average horizontal illumination in the pedestrian tunnel should be 30lx at night and 100lx during the day; the minimum horizontal illumination should be 15lx at night and 50lx during the day. And should provide vertical illuminance. 

5.2.9 The lighting of pedestrian bridges shall meet the following requirements: 

1 The pedestrian bridge crossing the road with lighting facilities may not be provided with additional lighting. It is advisable to adjust the height of the conventional lighting poles on both sides of the bridge, the installation position, and the configuration of the light source lamps according to the needs of the bridge deck lighting. When the illuminance of the bridge surface is less than 2lx and the illuminance of the stairs is less than 5lx, the pedestrian bridge lighting should be specially set up. 

2 The average horizontal illuminance of the pedestrian bridge deck with special lighting should not be less than 5 lx, and the ladder illuminance should be increased accordingly, and the ratio of the horizontal illuminance of the stepped pedal to the vertical illuminance of the kickboard should not be less than 2:1. 

3 The overpass lighting facilities should avoid glare to pedestrians and motor vehicle drivers. 

5.2.10 The lighting of public parking lots shall meet the following requirements: 

1 The lighting standards of public parking lots should meet the requirements of Table 5.2.10. 

Table 5.2.10 Lighting standard values of public parking lots 

Note: Low traffic volume refers to residential areas or surrounding areas; traffic volume refers to the surrounding areas of general stores, hotels, office buildings, etc.; high traffic volume refers to surrounding areas such as downtown areas, commercial centers, large public buildings, and sports and entertainment facilities. 

2 The lighting of the entrance and exit of the parking lot should be strengthened, and it should be provided with lighting for traffic signs and markings and should relate to the lighting of connected roads. 

5.2.11 When roads are bounded by water surfaces such as lakes or rivers, and the lamps are arranged on one side, the light poles should be arranged on the side adjacent to the water. 

5.2.12 When the road with the average brightness of the road surface higher than 1.0cd/m2 is connected to the road without lighting facilities, and the driving speed limit is higher than 50km/h, transitional lighting should be installed. 

5.2.13 The lighting of tree planting roads should meet the following requirements: 

1 The trees planted on the new road should not affect the road lighting, and the tree layout axis should not coincide with the light pole layout axis. 

2 The trees that affect the lighting effect in the expansion and reconstruction of the road should be transplanted; 

3 Trees should not be planted within the repair radius of the high pole lamp holder. 

4 The following measures can be taken on road sections where trees seriously affect led road lights: 

1) Prune the branches and leaves that block the light. 

2) Change the installation method of lamps and lanterns, adopt horizontal suspension cable arrangement, or extend the cantilever length. 

3) Reduce the distance between lamps or lower the installation height. 

5.2.14 Road lighting in residential areas should meet the following requirements: 

1 The lighting level of pedestrian roads in residential areas shall meet the requirements of Article 3.5.1 of this standard. 

2 The installation height of the pedestrian road lighting in the residential area should not be less than 3.5m. The naked light should not be set at eye level. 

3 The lighting of mixed pedestrian and vehicle roads in residential areas should be divided into two categories. The roads in residential areas connected to urban roads should provide lighting according to the requirements of motorized roads, taking into account pedestrian traffic needs, and should meet the requirements of Article 3.3.1 of this standard. ; The road connecting the buildings in the residential area should be provided with lighting according to the requirements of pedestrian roads, taking into account the needs of motor vehicle traffic, and should meet the requirements of Article 3.5.1 of this standard; 

4 For the lighting of residential areas and nearby roads, the position of light poles, light Sources, lamps, and lighting methods, the vertical illuminance generated on the outer surface of the windows of residential buildings The maximum allowable value of the luminous intensity of the lamps and lanterns in the direction of the room should meet the current industry standards Relevant regulations of JGJ/T 163 of "Code for Design of Urban Night Scene Lighting", respond if necessary Lamps and lanterns take corresponding shading measures. 

5.2.15 The lighting of pedestrian crossings shall meet the following requirements: 

1 The average horizontal illuminance shall not be less than 1.5 times that of the road where the crosswalk is located. 

2 Vertical illuminances should be provided for the direction of the crosswalk toward the oncoming traffic. 

3 The crosswalk should be equipped with additional lamps, which can be installed near the crosswalk. The same conventional road lighting fixtures on motor vehicle traffic roads can also be used on crosswalks Directional narrow-beam lamps should be installed, but they should not cause glare to pedestrians and motor vehicle drivers. Influence, you can configure a special baffle in the lamp or control the installation of the lamp according to the needs slope. 4 A light source different from that of the road lighting can be used. 

5.2.16 The lighting of stops along the bus line should be strengthened, and vertical surface illumination should be provided. Ming: Lights should be installed at the entrance and exit of the harbor-style docking station. 

5.2.17 Ground lighting and vertical surface lighting should be provided for parking belts specially set up on the roadside. It should also prevent the shadow of the vehicle body from affecting the road lighting effect. 5.2.18 Urban tunnel lighting should meet the following requirements: 

1 The daytime lighting of the road in the tunnel should be divided into population section, transition section, and intermediate section And the exit section, and the lighting indicator should be determined according to the driving speed and traffic flow. The specific design should be in accordance with the current national standard "Code for Design of Urban Road Traffic Facilities" Implementation of relevant regulations of GB 50688. 

2 The night lighting standards for the roads inside the tunnel should be the same as the roads connected outside the tunnel. And according to the dimming arrangements of the connected roads and changes in traffic flow and other factors in the late-night Adjust the brightness of the road surface.

5.3 Design requirements when non-functional lighting is installed on both sides of the road

5.3.1 When decorative lighting is installed on buildings (structures), sidewalk trees, green belts, pedestrian bridges, bridges, and three-dimensional intersections on both sides of the road, they shall not conflict with the functional lighting on the road, and shall not reduce the functional lighting effect; It is advisable to combine decorative lighting and functional lighting for design. 

5.3.2 The light sources, lamps, and lighting methods of decorative lighting should be selected reasonably. The brightness of decorative lighting should be coordinated with the brightness of the road surface and the environment. Dynamic lighting with multiple light colors or frequent changes of multiple lighting patterns should not be used. The light colors, patterns, and shadows of decorative lighting should not interfere with the vision of motor vehicle drivers. 

5.3.3 The advertising lights installed on the light poles and on both sides of the road shall not interfere with the vision of the driver or hinder the recognition of traffic signals and signs.

6. Lighting power supply and control

6.1 Lighting power supply

6.1.1 The power load of urban road lamps should be a three-level load, and the lighting of important roads, transportation hubs, and squares with concentrated people in the city can be a second-level load. The power supply requirements of different levels of load should comply with the current national standard "Code for Design of Power Supply and Distribution System" GB 50052. 

6.1.2 The design of the road lighting power supply and distribution system should meet the following requirements: 

1 The power supply network design should meet the planning requirements. It is advisable to use a special transformer for an outdoor led street light to supply power. Transformers and lighting distribution boxes should be located close to the lighting load center and convenient for operation and maintenance. 

2 The transformer should be a three-phase distribution transformer with the connection group D and yni, and the transformation ratio and voltage tap should be selected correctly. 

3 The transformer should be operated in the best economic operation area. The upper limit of the average load factor of the dual-winding transformer should be 0.75, the lower limit should be 1.333, and should not be less than 0.3. 4 It is advisable to balance the three-phase load. The maximum phase load should not exceed 115% of the average value of the three-phase load, and the minimum phase load should not be less than 85% of the average value of the three-phase load. 6.1.3 Under normal operating conditions, the terminal voltage of the lighting fixture should be 90%-105% of the rated voltage. 

6.1.4 The road lighting power distribution system should be powered by underground cable lines. When overhead lines are used, overhead insulated power distribution lines should be used. The cross-section of the neutral wire should not be smaller than the cross-section of the phase wire, and it should meet the requirements of unbalanced current and harmonic current. 

6.1.5 The road lighting power distribution system shall have short-circuit protection and overload protection, and shall meet the requirements of the current national standard "Code for Design of Low-Voltage Power Distribution" GB 50054. Each single-phase circuit should be individually controlled and protected. Each luminaire should be equipped with a separate protection device. 

6.1.6 The busbar of the low-voltage distribution box should be in accordance with the current national standard "Low-voltage surge protection Protector (SPD) Part 12: Guide for Selection and Use of Surge Protector for Low-Voltage Distribution System" GB/T 18802.12, selection and setting of surge protective device (SPD). 

6.1.7 For lighting installations with installation heights above 15m or other installations on high-rise structures, lightning protection devices should be configured in accordance with the current national standard "Code for Lightning Protection Design of Buildings" GB 50057. 

6.1.8 The grounding form of your road lighting power distribution system should adopt the TT system or the TN-S system and should comply with the relevant regulations of the current national standard "Code for Low-Voltage Power Distribution Design" GB 50054. When the residual current protection device is adopted, it should also meet the current national standard 

6.1.9 The exposed conductive parts of metal lamp poles and components, lamp housings, power distribution, control boxes, etc. should all be connected with protective conductors. Grounding should comply with relevant national standards Provisions. In the case of meeting the grounding resistance requirements, natural grounding bodies such as street lamp foundation steel bars should be used. 

6.1.10 When possible, indirect contact protection can also be double-insulated or reinforced-insulated electrical equipment (Class II equipment). 

6. 1.11 The manhole cover and handhole cover of the road lighting power supply line, the inspection door of the lighting pole, and the outdoor distribution box of the led street light heads shall be equipped with a locking device that needs to be opened with a special tool.

6.2 Lighting control

6.2.1 The switching time of road lighting should be reasonably determined according to the geographical location of the area and seasonal changes, and a control method combining light control and time control that is corrected according to changes in sky brightness should be adopted. 

6.2.2 For the lighting of the lower level roads of interchanges or elevated roads, the switching time should be determined according to the actual brightness of the road, and the lights can be turned on in advance and turned off later. 

6.2.3 When the road lighting adopts a centralized remote control system, the remote control terminal shall have the control function of automatically turning on and off the street lamp and the manual emergency control function in the case of communication interruption. 

6.2.4 According to the actual conditions of the lighting system, weather changes in different areas of the city, changes in road traffic flow, lighting design, and management needs, select area control, loop control, or single light control. 

6.2.5 The natural illuminance level of road lighting when the lights are turned on and off should be 30lx for expressways and trunk roads, and 20lx for secondary trunk roads and branch roads.

7. Related Products

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9. People also ask

a. What is the standard lux level for street lighting?

Different roads have different lux standards. For example, the lux standard values of sidewalks and non-motorized vehicle lanes mentioned in point 3.5 above are divided into 4 grades according to the different traffic flow on the road. The first grade is the illuminance standard for sidewalks in urban downtown areas. It is 15lux, the second level is the sidewalk with high traffic, the illuminance value is 10lux, the third level is the road with medium traffic, the illuminance value is 7.5lux, and the last level is the road with less traffic, the standard value of illuminance is 5lux. Therefore, if you want to know the lux value, you need to judge the road type first, and then you can know it by referring to the standard according to the road type.

b. What is the average distance between street lights?

The spacing between the two poles should be about 2.5-3 times the height of the poles. Shorter light poles should be mounted at close intervals. The density, travel speed, and type of light source along the corridor will also determine the ideal height and spacing.

c. How do you calculate the space height ratio?

The pitch-to-mount height ratio (SHR) is the spacing between luminaires divided by their height above the horizontal reference plane.

d. Is standard for illumination level?

The standard unit of measurement of light intensity is called the LUX level.