This article systematically explores the evolution of radar technology from its military origins to its applications in maritime security, with a focus on analyzing the technological breakthroughs of phased array radar and its innovative uses in fields such as maritime management and fisheries protection. It highlights the transformative value of technological integration across multiple domains.

This paper proposes an intelligent traffic signal optimization solution based on radar technology. By deploying radar devices to monitor pedestrian and vehicle flow, speed, and trajectory in real time, the system dynamically adjusts traffic signal timing, improving traffic efficiency by over 30%. It effectively alleviates urban congestion and enhances the travel experience for both pedestrians and drivers.