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In the intersection, four sides are hanging red, yellow, green, three color traffic signal, it is silent "traffic police". Red and green lights are the international unified traffic signals. Red light is the stop signal, green light is the signal to pass. Intersection, several directions to the car are gathered here, some want to go straight, some want to turn,

2023

The history of signal light development

In 1858, a mechanical wrench type signal in red and blue with coal-fired gas as the light source was installed in the main street of London, England to direct carriages to pass. In 1868, British mechanical engineer Naite installed the world's earliest gas traffic light in the square in front of the Palace of Westminster in London.

2023

The origin and development history of traffic signals

Traffic signals are signals that direct the operation of traffic, generally consisting of red, green and yellow lights, as silent "traffic police", they play a great role in the management and control of road traffic. However, did you know that the original signal lights are only red and green colors? Today, I will introduce you to the origin and development of traffic signals.

2023

Components of the circuit breaker

Auxiliary contacts: mechanically linked contacts with the circuit breaker main circuit splitting and closing mechanism, mainly for the display of circuit breaker splitting and closing status, connected to the control circuit of the circuit breaker through the splitting and closing of the circuit breaker, the implementation of control or interlocking of its related appliances.

2023

What are the control methods of signal lights

Intersection traffic signal control machines are operated according to the pre-set timing scheme, also known as fixed-cycle control. A day only one timing scheme is called single-segment timing control; a day according to the traffic volume of different periods using several timing schemes called multi-segment timing control.

2023

Signal light rules

Article I to strengthen urban traffic management, facilitate transportation, maintain traffic safety to meet the needs of national economic construction, the development of the rules.

2023

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