Laredo KGNS-TV on MSN3d
New traffic signal to be activated this week
(KGNS) - A new traffic signal will be activated in South Laredo at a busy intersection ... Drivers are urged to drive with ...
Smithsonian Magazine20d
Chaotic Traffic From Horse-Drawn Carriages Inspired the World’s First Traffic Lights
Designed by John Peake Knight, a railway manager from Nottingham, the traffic signal was based on the semaphore system common at rail intersections. Colored arms raised 20 feet above the street ...