The first traffic signal was invent

The first traffic signal was invented by a railway signaling engineer. It was installed outside the Houses of Parliament in 1868. It resembled like any railway signal of the time, and was operated by gas. Therefor , it exploded and killed a policeman, and the accident forbade further development until cars became common. Recent traffic lights are an American invention. Red-green means were installed in Cleveland in 1914. Three-colour signals, operated in hand from a tower in the focus of the street, were installed in New York in 1918. The early lights of this type to appear in Britain were in London, on the junction between St.James’s Streetand Piccadilly, in 1925. Automatic signals were installed in the year later.In the past, traffic lights were rare . In New York, some lights had a statue on top.In Los Angeles the lights did not just alter silently, but would ring bells to get up the sleeping motorists of the 1930s. These are gone and have been replaced by standard models which are universally adopted.

Kết quả (Anh) 2:

The first traffic signal was invented by a railway signaling engineer. It was installed outside the Houses of Parliament in 1868. It resembled like any railway signal of the time, and was operated by gas. Therefor, it exploded and Killed a policeman, and the accident forbade off until cars became common Further development. Recent traffic lights are an American invention. Red-green means again in 1914. Were installed in Cleveland Three-color signals, operated in hand from a tower in the focus of the Streets, in New York là installed in 1918. The early lights of this type to Britain là trong in London , on the junction giữa St.James's Streetand Piccadilly, in 1925. Automatic là signals installed in the past the year later.In, traffic lights là rare. In New York, some lights had a statue on the lights top.In Los Angeles did not just alter silently, but would ring bells to get up the sleeping motorists of the 1930s. These are gone and được thay thế mà by universally Adopted standard models.