How Traffic Lights Decide When to Change | Smart Traffic Systems Explained | STEM Engineering #stem

Who controls traffic lights? How do traffic signals decide when to turn red, yellow, or green? In this detailed STEM engineering lesson, we explore how traffic light systems work — from fixed-time signals to adaptive traffic control, induction loop sensors, camera-based detection, AI-powered traffic management, signal timing algorithms, and smart city infrastructure. Learn about traffic flow theory, vehicle detection, intersection design, pedestrian signals, emergency vehicle preemption, and how cities use data to reduce congestion. Perfect for students interested in transportation engineering, systems design, artificial intelligence, urban planning, and smart technology. how traffic lights work, traffic signal control systems, adaptive traffic signals explained, induction loop sensor, vehicle detection traffic lights, smart traffic management, traffic flow theory, fixed time vs adaptive signals, traffic light timing algorithm, AI traffic control, smart city technology, transportation engineering basics, intersection design, pedestrian signal systems, emergency vehicle preemption, urban traffic planning, traffic congestion solutions, stem transportation engineering, how cities manage traffic, signal coordination green wave.