The fixed vehicle overspeed automatic detection system (LDR-6 evidence radar) consists of a fixed-angle radar, an industrial-grade high-resolution digital camera, a specialized uninterrupted power supply for supplementary lighting, a wireless transmission module, and a background data maintenance terminal. The product uses self-developed narrow beam speed measurement radar as the speed sensor, capable of measuring the speed of moving targets in the same direction (departing) and opposite direction (approaching) while stationary. It is suitable for installation in road green belts or roadsides, adapting to various harsh weather conditions, and can operate unattended around the clock.