Classification of signal lights
Release time：
2023-03-02 14:04
Source：
Motor vehicle signals and non-motor vehicle signals
Motor vehicle signal is a set of three lights consisting of red, yellow and green circular units without patterns to guide the passage of motor vehicles.
Non-motorized signals are a set of three lights consisting of red, yellow and green circular units with bicycle patterns inside, guiding the passage of non-motorized vehicles.
When the green light is on, the vehicle is allowed to pass, but the turning vehicle shall not impede the passage of straight ahead vehicles and pedestrians.
When the yellow light is on, the vehicle has crossed the stop line can continue to pass.
When the red light is on, the vehicle is prohibited from passing.
At intersections without non-motorized signals and pedestrian crosswalk signals, non-motorized vehicles and pedestrians should follow the instructions of the motor vehicle signal to pass.
When the red light is on, right-turning vehicles may pass without impeding the passage of released vehicles and pedestrians.
Pedestrian Crossing Signal
A set of signals consisting of a red pedestrian standing pattern inside and a green pedestrian walking pattern inside, guiding pedestrians to pass.
When the green light is on, pedestrians are permitted to cross the pedestrian crossing.
When the red light is on, pedestrians are prohibited from entering the pedestrian crossing, but those who have already entered the crosswalk may continue to pass or stay at the center line of the road to wait.
Lane Signal
A signal consisting of a fork pattern and an arrow pattern to guide vehicles in this lane to pass as directed.
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Lane Signal
When the green arrow light is on, vehicles in this lane are permitted to pass in the direction indicated.
When the red fork light or arrow light is on, vehicles in this lane are prohibited from passing.
Directional Indicator Signal
The direction indicator signal is a set of three lights consisting of red, yellow and green with arrow patterns inside, used to guide motor vehicles to pass in the indicated direction.
The arrow direction to the left, up, and to the right indicate left turn, straight ahead, and right turn respectively.
Flashing warning signal
Flashing warning signal is a continuous flashing yellow light, prompting vehicles and pedestrians to pay attention to the lookout when passing, to confirm the safety of passing.
Road and railroad crossing signal
Road and railroad crossing signal is set at the intersection of road and railroad two or a red signal, used to guide vehicles and pedestrians to pass.
Two red lights alternately flashing or a red light is on, indicating that vehicles and pedestrians are prohibited; when the red light is off, indicating that vehicles and pedestrians are allowed to pass.
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Other developments
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,
Main characteristics of circuit breakers
The characteristics of the circuit breaker are mainly: rated voltage Ue; rated current In; overload protection (Ir or Irth) and short-circuit protection (Im) decoupling current adjustment range; rated short-circuit breaking current (industrial circuit breaker Icu; household circuit breaker Icn), etc.
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.
Circuit breaker is a switching device that can close, carry and open the current under normal circuit conditions and can close, carry and open the current under abnormal circuit conditions within a specified period of time.
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