Scientists have revealed a futuristic 'communication with light' system that uses light pulses instead of radio waves to ...

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.

Traffic lights have been with us since 1868, when the first gas-powered set was switched on in London. These lights used a semaphore system similar to those used by the railways of the day and ...