In 1858, red and blue mechanical spanner lights were installed on the main streets of London to direct horse-drawn carriages. It was the world's first traffic light. In 1868, The British mechanical engineer Nayet installed the world's first gas traffic lights in the square in front of the Houses of Parliament in Westminster, London. It consists of two red and green rotating square glass lanterns. Red means "stop" and green means "pay attention". On 2 January 1869, the gas lamp exploded, injuring police officers, and was cancelled
In 1914, electric traffic lights appeared in the United States. The lights are made up of circular red, green and yellow projectors mounted on a tower on 5th Street in New York City. A red light means "stop" and a green one means "go".
In 1918, there were controlled traffic lights and infrared traffic lights. A traffic light with controls, in which pressure detectors are placed underground and vehicles turn green as soon as they approach a red light; The other is to use a loudspeaker to start a traffic light. When a driver encounters a red light, he clicks his horn and the light turns green. Infrared traffic lights can detect when a pedestrian is about to cross a road when he or she steps on a pressure-sensitive road, and infrared beams can extend the red light of a signal for a while, delaying the release of a car and preventing accidents.
The appearance of signal lights makes traffic control effective, which has obvious effect on traffic flow diversion, road capacity improvement and traffic accident reduction. In 1968, the United Nations Agreement on Road Traffic and Road Signalling defined the meaning of various traffic lights. A green light is a go signal. A car facing the green can go straight, turn left and turn right, unless another sign forbids a particular turn. Vehicles turning left and right must give priority to vehicles legally in the intersection and pedestrians crossing the crosswalk. A red light is a no-go signal. Vehicles facing the red light must stop behind a stop line at an intersection. The yellow light is a warning signal. Vehicles facing the yellow light should not cross the stop line, but they can enter the intersection when they are too close to the stop line to stop safely. Since then, the rule has been adopted worldwide.
In 1858, red and blue mechanical spanner lights, lit by coal-burning gas, were installed on the main streets of London, England, to direct horse-drawn carriages. It was the world's first traffic light. In 1868, The British mechanical engineer Nayet installed the world's first gas traffic lights in the square in front of the Houses of Parliament in Westminster, London. It consists of two red and green rotating square glass lanterns. Red means "stop" and green means "pay attention". On 2 January 1869, the gas lamp exploded, injuring police officers, and was cancelled.
In 1914, electric traffic lights appeared in the United States. The lights are made up of circular red, green and yellow projectors mounted on a tower on 5th Street in New York City. A red light means "stop" and a green one means "go".
In 1918, there were controlled traffic lights and infrared traffic lights. A traffic light with controls, in which pressure detectors are placed underground and vehicles turn green as soon as they approach a red light; The other is to use a loudspeaker to start a traffic light. When a driver encounters a red light, he clicks his horn and the light turns green. Infrared traffic lights can detect when a pedestrian is about to cross a road when he or she steps on a pressure-sensitive road, and infrared beams can extend the red light of a signal for a while, delaying the release of a car and preventing accidents.
The appearance of signal lights makes traffic control effective, which has obvious effect on traffic flow diversion, road capacity improvement and traffic accident reduction. In 1968, the United Nations Agreement on Road Traffic and Road Signalling defined the meaning of various traffic lights. A green light is a go signal. A car facing the green can go straight, turn left and turn right, unless another sign forbids a particular turn. Vehicles turning left and right must give priority to vehicles legally in the intersection and pedestrians crossing the crosswalk. A red light is a no-go signal. Vehicles facing the red light must stop behind a stop line at an intersection. The yellow light is a warning signal. Vehicles facing the yellow light should not cross the stop line, but they can enter the intersection when they are too close to the stop line to stop safely. Since then, the rule has been adopted worldwide.