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2007-07-24 07:02:54 · 5 answers · asked by colin050659 6 in Cars & Transportation Commuting

5 answers

In 1868. Here's the webpage from Wikipedia:

History
In the 1920s, after continued destruction of a standard traffic light, the City of Syracuse in the United States gave up and installed a traffic light with green on the top. Residents of Irish descent had objected to the fact that "British" red was placed above "Irish" green.
In the 1920s, after continued destruction of a standard traffic light, the City of Syracuse in the United States gave up and installed a traffic light with green on the top. Residents of Irish descent had objected to the fact that "British" red was placed above "Irish" green.
Marshalite traffic signal. Formerly fitted in various intersections in Melbourne, indicating how much time remained before a signal change.
Marshalite traffic signal. Formerly fitted in various intersections in Melbourne, indicating how much time remained before a signal change.

On 10 December 1868, the first traffic lights were installed outside the British Houses of Parliament in London, by the railway engineer J.P. Knight. They resembled railway signals of the time, with semaphore arms and red and green gas lamps for night use. The gas lantern was turned with a lever at its base so that the appropriate light faced traffic. Unfortunately, it exploded on 2 January 1869, injuring the policeman who was operating it.

The modern electric traffic light is an American invention.[1] As early as 1912 in Salt Lake City, Utah, policeman Lester Wire invented the first red-green electric traffic lights. On 5 August 1914, the American Traffic Signal Company installed a traffic signal system on the corner of 105th Street and Euclid Avenue in Cleveland, Ohio.[2] [3] It had two colors, red and green, and a buzzer, based on the design of James Hoge, to provide a warning for color changes. The design by James Hoge (USPTO # 1251666 Sept. 22, 1913) allowed Police and Fire stations to control the signals in case of emergency. The first four-way, three-color traffic light was created by police officer William Potts in Detroit in 1920.[4] In 1923, Garrett Morgan patented a traffic signal device, although it was not a precursor of the modern traffic light [6].

The first interconnected traffic signal system was installed in Salt Lake City in 1917, with six connected intersections controlled simultaneously from a manual switch. Automatic control of interconnected traffic lights was introduced March 1922 in Houston, Texas.[5] The first automatic experimental traffic lights in England were deployed in Wolverhampton in 1927.[6]

Ampelmännchen pedestrian traffic signals have come to be seen as a nostalgic sign for the former German Democratic Republic.

2007-07-24 07:07:52 · answer #1 · answered by Kev E 5 · 0 0

The first traffic lights actually had their roots in the railway signals used at the time, where two gas lamps, one red and one green, would be alternately hidden by a semaphore arm depending on whether the arm was in a horizontal position or at a 30° angle.

The first traffic lights (which were operated manually) were installed outside the Houses of Parliament in London on 10 December, 1868 to control the increasing number of vehicles there. However, according to some sources, they later exploded and injured the policeman operating them - the lights were illuminated by gas...

The first automatic traffic lights in England were deployed in Wolverhampton in 1927.

2007-07-24 21:44:21 · answer #2 · answered by Nightworks 7 · 0 0

Affectionately called "Marvellous Melbourne" during the gold dash of the 1850s, the title continues to be used today for Australia's next greatest city Melbourne, a town that you could visited with hotelbye . Located on the banks of the Yarra River, near the entrance to Port Phillip Bay, Melbourne is a modern city steeped in history. With huge wealth generated from the regional goldfields, regal buildings were made through the city. A number of these buildings however stay today, and Melbourne is regarded as having more examples of Victorian structure than every other city in Australia. One place you cannot miss in your stop by at Melbourne could be the Southbank and Arts Centre Melbourne. On the banks of the Yarra River that area is really a culturally wealthy attraction for visitors. Southbank promenade is full of indoor/outdoor cafés, restaurants, and stay entertainment. Simply familiar by their spire, the Arts Centre features a variety of theaters and spaces such as the State Theatre, Playhouse, Fairfax Theatre, and Hamer Hall, the premier efficiency space for the admired Melbourne Symphony Orchestra.

2016-12-23 02:00:43 · answer #3 · answered by Anonymous · 0 0

i believe that traffic lights were introduced in the early 60's

2007-07-24 07:08:28 · answer #4 · answered by e715000 2 · 0 1

Sorry i dont know Probably a long time ago and some motorists still dont know how to use them.

2007-07-24 07:10:21 · answer #5 · answered by Anonymous · 1 0

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