What is the purpose of the spotlights on highway gantries?

[ReaganMarie]

Gantry spotlights are installed for safety purposes. Here are the key details: 1. Fill lights: The spotlights on gantries, also called fill lights, ensure clearer license plate captures by the automated recognition systems mounted on these structures, providing more substantial evidence. As highways inherently involve higher speeds, traffic violations at such velocities become particularly hazardous. 2. Illumination requirements: These fill lights must provide uniform lighting coverage without dark spots or noticeable flickering within their designated area. At 20 meters from the light source, the peak illumination on the central axis should be below 300lx, with average illumination under 50lx, featuring visible light color temperatures between 3000-5500K. This brightness level is approximately equivalent to standard street lighting.