The Clever Way Traffic Lights Worked Before Computers

Before the advent of computers, traffic lights were a marvel of mechanical and electromechanical engineering, utilizing timers, relays, and human intervention to manage bustling city intersections. This era of pre-digital innovation, which also saw breakthroughs like Hollywood star Hedy Lamarr’s invention of frequency-hopping spread spectrum technology, laid the groundwork for modern advancements such as AI-controlled traffic lights.

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