The general process of road lighting design is as follows

The general process of road lighting design is as follows:### Preliminary Investigation- **Data Collection**: This includes basic data such as the grade, length, width, slope, and curvature of the road, as well as information on traffic flow, pedestrian flow, and the surrounding environment (such as buildings, trees, etc.), and local climatic conditions and power supply situations.- **On-site Inspection**: Conduct an on-site inspection of the current situation of the road, understand the layout and usage of the existing lighting facilities, as well as the factors that may affect the lighting design, such as the distribution of underground pipelines and the limitations of road construction.### Determine Design Standards- According to the type of the road (such as urban arterial roads, secondary arterial roads, branch roads, etc.) and its usage function, and based on relevant standards and specifications, determine various technical indicators of lighting, such as average illuminance, illuminance uniformity, glare limitation, color rendering index, etc. For example, the average illuminance of urban arterial roads generally requires to be between 20 - 30lx.### Lighting Scheme Design- **Luminaire Selection**: Select appropriate types of luminaires according to the characteristics of the road and design requirements, such as high-pressure sodium lamps, LED lamps, etc. LED lamps are widely used in modern road lighting due to their advantages of energy conservation, long lifespan, and good color rendering. At the same time, determine the light distribution curve of the luminaires to achieve the best light distribution.- **Luminaire Layout**: Common luminaire layout methods include single-side layout, double-side staggered layout, double-side symmetrical layout, and central symmetrical layout. Select an appropriate layout method according to the width of the road, lighting requirements, and the surrounding environment. For example, a single-side layout can be adopted for roads with a width of less than 15m, and a double-side layout can be considered for roads with a width of more than 15m.- **Determine Installation Height and Spacing**: The installation height and spacing of the luminaires will affect the lighting effect and uniformity. Generally, the installation height of the luminaires is between 8 - 12m, and the spacing is determined according to factors such as the luminous flux of the luminaires and the width of the road, usually between 30 - 50m.### Calculation and Simulation- Use professional lighting design software to conduct lighting calculations and simulations based on the selected luminaires, layout methods, installation height, and spacing. Through calculation, obtain indicators such as the illuminance distribution and uniformity of the road surface to verify whether the design scheme meets the standard requirements. If it does not meet the requirements, the design parameters need to be adjusted, and the calculation and simulation need to be carried out again.### Energy-saving Design- Adopt energy-saving luminaires and light sources to improve lighting efficiency and reduce energy consumption. For example, select high-efficiency LED luminaires, and use an intelligent lighting control system according to the traffic flow and time period of the road to achieve automatic adjustment of brightness. For example, when the traffic flow is low in the late night, automatically reduce the brightness of the luminaires to achieve the purpose of energy conservation.### Construction Drawing Design- Draw detailed construction drawings according to the final determined design scheme, including the plan layout of the luminaires, installation detail drawings, electrical system diagrams, grounding system diagrams, etc. The construction drawings should mark the location, model, specification, installation height, spacing and other detailed information of the luminaires, as well as the electrical parameters such as the laying method, pipe diameter, and length of the cable, providing an accurate basis for construction.### Construction and Acceptance- **Construction Stage**: Carry out construction strictly in accordance with the construction drawings to ensure that the installation position, height, and angle of the luminaires meet the design requirements, the cable laying is standardized, and the grounding system is reliable. During the construction process, pay attention to protecting the road and the surrounding environment, and avoid causing too much impact on the traffic.- **Acceptance Stage**: After the construction is completed, conduct a comprehensive acceptance of the lighting system. This includes the lighting test of the luminaires, illuminance detection, uniformity detection, glare detection, etc., and check whether all indicators meet the design standards. At the same time, check the safety and reliability of the electrical system, such as whether the grounding resistance and insulation resistance meet the requirements. After passing the acceptance, it can be officially put into use.