First electric traffic signal installed

On the day of 1914, the world's first electrical signals took place at the corner of Euclid Avenue and East 105 Street, Cleveland, Ohio.

Driving on an American road was a chaotic experience in the early stages of the car, pedestrians, bicycles, horses, and trams were competing with cars. Although the problem was relaxed as transportation disappeared, even before World War I, establish a series of rules and rules to maintain traffic flow and reduce the number of accidents on the road It became clear that it is not necessary. As Christopher Finch wrote in his "American Car Biography" (1992), the first traffic island was used in San Francisco, California in 1907 and the left rudder was driven in 1908 . The first central picture boundary appeared in Michigan in 1911; and the first "ban prohibition" sign will debut in New York's Buffalo in 1916 .

There are various conflicting arguments about who is in charge of the world's first traffic signal. The device installed in London in 1868 has two signal arms that extend horizontally and emit a "stop" signal at a 45 degree angle indicating "attention". In 1912, a policeman named Lester Wire of Salt Lake City, Utah installed a handmade wooden box with a colored signal in a pole connected to the overhead trolley and lights. The most noteworthy thing is said that inventor Garrett Morgan was admired by inventing his T - shaped traffic signal, was patented in 1923, and then sold to General Electric.

Despite Morgan's higher visibility, the system was set up in Cleveland on August 5, 1914 and is widely regarded as the first electrical traffic light. According to the design of James Hoge, he acquired the "municipal traffic control system" of U.S. Pat. No. 1,251,666 in 1918. It consists of 4 pairs of red and green lights as stop lights, each attached to a corner post. A manually operated switch is connected to the control room and the system is configured not to generate a collision signal. According to the "Driver" article released by the Cleveland Automobile Club in August 1914, "This system may be destined to completely change the handling of congested urban street traffic." The Transport Committee is universal You should think seriously for a recruitment. "

Wire system is truly revolutionary, but this system installed at the corner of Euclid Avenue and East 105th Street in Cleveland, Ohio on August 5, 1914, is the world's first electrical traffic light. Based on James Hoge's design - the 1918 patented "Municipal Traffic Control System" - the Cleveland signal includes four pairs of red and green lights as stop lights. Decisively, the manual operating system is designed so that the collision signal is impossible.

Despite Morgan's higher visibility, the system was set up in Cleveland on August 5, 1914 and is widely regarded as the first electrical traffic light. According to the design of James Hoge, he acquired the "municipal traffic control system" of U.S. Pat. No. 1,251,666 in 1918. It consists of 4 pairs of red and green lights as stop lights, each attached to a corner post. A manually operated switch is connected to the control room and the system is configured not to generate a collision signal. According to the "Driver" article released by the Cleveland Automobile Club in August 1914, "This system may be destined to completely change the handling of congested urban street traffic." The Transport Committee is universal You should think seriously for a recruitment. "

In 1912, a police officer Lester Wire in Salt Lake City, Utah developed an electrical traffic signal, he also used a traffic light. On 5 August 1914, the American Traffic Signal Company installed a traffic signal system at the corner of East 105th Street and Euclid Avenue in Cleveland, Ohio. : 27-28 According to James Hoge's design, it contains two colors of red and green, and a buzzer warning the change in color. With the design of James Hoge, police and fire departments can control signals in case of emergency. The first 4 color 3 color signal was created in 1920 by William Potts, a police officer in Detroit, Michigan. Ohio Asheville claims that it is the place of the oldest working signal light in the United States as a public intersection. The road from 1932 to 1982 was moved to the local museum. Traffic Signal Troops page displays a lot of historical traffic light photos.