How to prevent street lamp glare from affecting drivers or pedestrians?

Reasonably determine the installation height and angle of lamps
The installation height and angle of street lamps have a direct relationship with the control of glare. During the design and installation process, the installation height of street lamps should be scientifically selected according to the road grade, width, traffic volume and environmental characteristics to ensure that the light of the lamps can evenly cover the road surface and avoid direct light into the sight range of drivers and pedestrians. In general, the installation height of road lamps is proportional to the width of the road, and the lamps should avoid emitting too much light upward to reduce interference with the sky and surrounding environment. The installation angle of the lamps needs to be accurately calculated and adjusted to focus the direction of the light beam on the road and pedestrian area to prevent the light from deviating and causing glare.

Choose lamps with anti-glare design
The anti-glare design of the lamp itself is an important means to control glare. In the selection stage, lamps with anti-glare function should be selected. Such lamps usually adopt reasonable light distribution design and shading components, such as anti-glare grilles, shading hoods or high-efficiency reflectors, to effectively control the direction of light beam emission and reduce the scattering of excess light. For LED street lamps, attention should also be paid to the point distance of the light source and the arrangement of the light source to avoid the formation of too strong bright spots. In addition, the protection level and anti-corrosion performance of the lamp housing should also meet the requirements of the use environment to ensure long-term and stable anti-glare effect.

Scientifically design the brightness and color temperature of the light source
The selection of light source brightness and color temperature is also a key factor in preventing street light glare. Excessive brightness can easily cause visual discomfort and glare, especially at night or in rainy and snowy weather, and reflected light will further enhance the glare effect. Therefore, in the design of road lighting, the appropriate light source brightness should be selected in combination with the road function and environmental background. In terms of color temperature, a warmer light source (such as 3000K-4000K) can be selected, which has soft light, is more friendly to the human eye, and helps to reduce visual fatigue. The brightness distribution should be kept uniform to avoid excessive or low local brightness to prevent adaptive glare caused by strong contrast.

Reasonably arrange the layout and spacing of street lights
If the layout and spacing of street lights are unreasonable, it is also easy to cause local over-brightness or over-dark areas, thereby creating glare hazards. When designing, the arrangement of street lights (such as single-sided arrangement, bilateral symmetrical arrangement or staggered arrangement) should be reasonably determined according to the road type, traffic conditions and surrounding environment, and the spacing should be appropriately controlled to ensure uniform lighting. For the arrangement of street lights in areas such as sidewalks and bicycle lanes, it is also necessary to avoid the lamps being too close to the pedestrian activity range to reduce the interference of direct light on the line of sight. If necessary, glare can be reduced by layered lighting or low-pole lighting on terrain with large height differences.

Enhance the shading effect of greening and ancillary facilities
In urban road lighting, some light can be blocked by adding green belts, isolation belts or setting up landscape structures. These facilities not only improve the urban environment, but also effectively weaken the impact of direct light on drivers and pedestrians. For example, planting tall trees or setting up flower beds in the central isolation belt can shield part of the upward light and reduce the problem of high beam glare. In addition, some cities set up guardrails or sunshades in areas such as elevated roads and overpasses to further control the light propagation path and achieve the purpose of anti-glare.

Promote intelligent lighting control technology
The application of intelligent lighting control system is a modern measure to prevent glare. Through the intelligent control system, the brightness and lighting mode of street lamps can be dynamically adjusted according to factors such as traffic flow, climate conditions, time period, etc. For example, when there is less traffic in the middle of the night, appropriately reducing the brightness of street lamps can not only save energy but also reduce the interference of glare to a small number of passing vehicles and pedestrians. The intelligent system can also realize regional control, implement targeted dimming for different sections of roads or special places, and reduce unnecessary light pollution and glare risks from the source.

Regularly inspect and maintain street lamp facilities
The anti-glare effect is not a one-time solution and needs to be guaranteed through regular inspection and maintenance. During the long-term use of street lamps, the anti-glare function may be weakened due to the displacement of lamps, damage to shading devices or aging of lamps. Therefore, the management unit should formulate a street lamp maintenance plan, regularly check the installation angle of lamps, the integrity of shading components and the working status of light sources, and promptly discover and eliminate potential hazards that may cause glare. For sections where glare problems have occurred, measures such as adjusting the installation angle, replacing lamps or adding anti-glare facilities should be taken as soon as possible to rectify them.

Strengthen planning, design and implementation of standards
Preventing street lamp glare needs to start from the source of planning and design, and strictly implement relevant national and industry standards. In new and renovated road lighting projects, design units should combine the requirements of documents such as "Road Lighting Design Standards" and "Urban Road Lighting Engineering Construction and Acceptance Specifications", comprehensively consider indicators such as illumination, uniformity, and anti-glare levels, and conduct verification during the construction and acceptance stages to ensure that anti-glare measures are effectively implemented. At the same time, the use of advanced lighting concepts and technologies should be encouraged to improve the overall level of urban lighting projects.