Traffic lights today are controlled by computers and other purpose-built systems, but what did people do before computers ...
Morning Overview on MSN
The clever way traffic lights worked before computers
Before the advent of computers, traffic lights were a marvel of mechanical and electromechanical engineering, utilizing ...
A sideways traffic light might look strange at first, but it’s fully functional and intentional. In several U.S. states, horizontal traffic lights are the standard. They display the same red, yellow, ...
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