This podcast explains traffic signal operations, detailing various detection sensors like inductive loops, video detection cameras, and radar. It covers different signal types including pre-timed, semi-actuated, fully actuated, and adaptive controls. Key topics include traffic signal preemption for emergency vehicles using systems like infrared strobes, acoustic, line-of-sight, radio, and GPS-based technologies, alongside traffic signal coordination through wireless networks and adaptive signal control technology to enhance traffic flow and efficiency.