Its on 1914 August 5th first electric traffic signal system installed at Euclid Avenue and East 105th street in Cleveland,Ohio. Google marks 101st anniversary of it with an animated doodle on homepage of selected countries today.
It’s based on James Hoge’s design, first electric traffic signal system including red and green light along with a buzzer to indicate the color change installed. First known traffic signal patent in United States was granted to James Hoge for his design of ‘Municipal Traffic Control System’ in 1918. Lester Wire is another prominent name that comes in list considering the invention of electric traffic signal light. It’s in 1912 Lester Wire developed the electric traffic signal system ,but was not patented.
From the time man started to use wheeled vehicles to travel along road, accidents taking life of peopel became a common incident. It became necessary to use some control systems to manage the traffic flow and reduce accidents. Evolution of traffic control system starts from that time when human official controlled traffic standing in between road junctions. Now it has reached to automatic computerized control system. Here are some of the important invention in traffic control system leading to today’s model.
History of Traffic Signal System
1868 : Gas lit traffic signal system installed in London.
1869 : Gas lit system was abandoned due to an explosion on 2 January 1869.
1912 : Lester Wire developed electric traffic signal system, know unofficially as Wire’s Bird Cage.
1914 : James Hoge designed electrical signal system installed on 5 August 1914.
1920 : Three color traffic signal system designed by William Potts.
1920 October: First automated traffic signal was installed in Los Angeles on Broadway.
Later count down timers were introduced with automated traffic signals. So, on 101st anniversary of the most useful invention for mankind, enjoy the doodle on your Google homepage. Doodle will be visible on homepage of selected countries for 24 hours on 5 August 2015.