What are traffic lights used for? What is the function of traffic lights?

In 1858, red and blue mechanical wrench signal lights were installed on the main streets of London, England, to direct the passage of horse-drawn carriages. It was the world's first traffic light. In 1868, the British mechanical engineer Nait installed the world's first gas traffic light in the square in front of the Houses of Parliament in London's Westminster borough.

It consists of red and green rotating square glass lanterns, red for "stop" and green for "attention". On the 23rd day of its operation, a police officer on duty was suddenly killed on the spot and was cancelled.

In 1914, electrically activated traffic lights appeared in the United States. The traffic lights consist of red, green, and yellow circular projectors installed on a tall tower on 5th Avenue in New York City. A red light indicates "stop" and a green light indicates "pass".

In 1918, there were again controlled traffic lights and infrared traffic lights. Traffic lights with control, one is to put the pressure detector underground, and the vehicle will turn green as soon as the vehicle approaches the red light; The other is to use a megaphone to activate the traffic light, and when the driver turns the red light, the red light will turn green. Infrared traffic lightsWhen a pedestrian steps on a pressure-sensitive road, it can detect that someone is about to cross the road, and the infrared beam can prolong the red light of the traffic light for a period of time, delaying the release of cars to avoid traffic accidents.

The emergence of traffic lights enables effective traffic control, which has obvious effects on diverting traffic flow, improving road capacity, and reducing traffic accidents. In 1968, the United Nations Agreement on Road Traffic and Road Sign Signals defined the meaning of the various types of signal lights. A green light is a traffic signal, and vehicles facing a green light can go straight, turn left and turn right, unless another sign prohibits a certain kind of turn.

Vehicles turning left and right must give priority to vehicles that are legally moving within the intersection and pedestrians crossing the crosswalk. A red light is a no-go signal, and vehicles facing the red light must stop behind the stop line at the intersection. A yellow light is a warning signal that a vehicle facing a yellow light cannot cross the stop line, but it can enter an intersection if it is too close to the stop line to stop safely.

Since then, this provision has been used all over the world.

The signal light in the circuit is generally used to indicate a certain state, such as the operating status of the equipment, the fault state, and so on! Hope.

Signal light is a category of traffic safety products, which is an important tool to strengthen road traffic management, reduce the occurrence of traffic accidents, improve the efficiency of road use, and improve traffic conditions.

Traffic lights are divided into: motor vehicle signal lights, non-motor vehicle signal lights, pedestrian crossing signal lights, lane signal lights, direction indication signals, flash warning lights, road and railway level intersection signal lights.

Motor vehicle signal lights and non-motor vehicle signal lights indicate:

1. When the green light is on, vehicles are allowed to pass, but the turning vehicles shall not obstruct the passage of the straight-going vehicles and pedestrians that are released;

2. When the yellow light is on, vehicles that have crossed the stop line can continue to pass;

3. When the red light is on, vehicles are prohibited from passing.

At intersections where non-motor vehicle signal lights and pedestrian crossing signal lights are not installed, non-motor vehicles and pedestrians shall pass according to the indication of motor vehicle signal lights.

The traffic light is obviously a male reminder.

Signal lights are definitely used to transmit signals or prompts.

As the name suggests, signal lights are used to transmit signals to quickly transmit or indicate certain commands!

As the name suggests, the signal light is a light that indicates that the power supply is on or off, and the light is on to represent the power of the line

Traffic lights are divided into: motor vehicle signal lights, non-motor vehicle signal lights, pedestrian crossing signal lights, lane signal lights, direction indication signals, flash warning lights, road and railway level intersection signal lights. Traffic lights are used at road level intersections, and the traffic flow of people and vehicles arriving at the same time is reduced as much as possible by issuing instructions to vehicles and pedestrians to move or stop, so as to reduce mutual interference as much as possible, so as to improve the traffic capacity of the intersection and ensure the smooth flow and safety of the intersection.

1) Motor vehicle signal lights.

When the green light is on, the vehicle is allowed to pass, but the turning vehicle shall not obstruct the passage of the vehicle and pedestrians who are released; When the yellow light is on, vehicles that have crossed the stop line can continue to pass; When the red light is on, it is forbidden to stop the passage of vehicles.

2) Lane signal lights.

The lane signal light is composed of a green arrow light and a red fork light or a red arrow light, and when the green arrow light is on, the vehicle in the lane is allowed to pass in the indicated direction; When the red fork light or red arrow light is on, vehicles in this lane are prohibited.

3) Pedestrian crossing signals.

The pedestrian crossing signal light consists of a green light and a red light, and when the green light is on, pedestrians are allowed to cross the crosswalk; When the red light is on, pedestrians are not allowed to enter the crosswalk, but those who have already entered the crosswalk can continue to pass or wait at the center line of the road.

1. How to look at traffic lights.

1. Traffic light capture period and view. It is necessary to see the signal light clearly (if possible, 2 or 3 signal lights before reaching the signal light). After seeing the signal light, you should confirm it repeatedly, ** the signal light changes, do not rush too quickly, and drive calmly.

2. The first and judgment method of the change cycle of the signal lamp:

1) When you see a signal light from a distance, you should judge the next signal period.

2) Green signal light: It may not be possible to pass, judging by turning into a yellow signal light (be prepared to slow down and stop at any time).

3) Yellow signal light: According to the distance and speed to the intersection, determine whether to go forward or stop.

4) Red Signal Light: Stop. When the light is already red from a distance, the time it becomes green to grasp the driving speed.

2. A few points will be deducted for violating traffic lights.

1. The "Regulations on the Application and Use of Motor Vehicle Driving Licenses" (Order No. 123 of the Ministry of Public Security) stipulates that if a motor vehicle violates the road traffic lights, 6 points will be deducted at a time;

2. Violation of road traffic lights is not in accordance with the instructions of traffic lights, the specific provisions are as follows: Article 38 of the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China" stipulates:

1. When the green light is on, vehicles are allowed to pass, but the turning vehicles shall not obstruct the passage of the straight-going vehicles and pedestrians that are released;

2. When the yellow light is on, vehicles that have crossed the stop line can continue to pass;

3. When the red light is on, vehicles are prohibited from passing.

3. Traffic signals are divided into: motor vehicle signal lights, non-motor vehicle signal lights, pedestrian crossing signal lights, lane signal lights, direction indication signal lights, flash warning lights, road and railway level intersection signal lights.

Interpretation of traffic lights.

A lamp that emits various signals with light. The light of different colors or the intermittent light that is bright and sometimes goes off conveys the dissipation of the disturbance and the display of the situation. It is mostly used in transportation facilities, vehicles or electronic equipment, etc.

People's Literature, No. 2, 1979: "It is covered with red, green, blue, and white signal lights in horizontal and vertical rows. ”

The word Li Book language decomposition.

Interpretation of the letter Honesty ì honesty, not deception : credit. Abide by.

Token. Letters. Vow solemnly.

do not doubt, think reliable: trust. Fiduciary.

Confidence. Belief. Worship:

Faith. Believer. Message:

Information. There was no news. Correspondence:

Correspondence. Letterhead. Homing pigeon.

Petition. Explanation of the signal light used at night in the army to convey orders or report military information is explained in detail.

A lamp used in the army to convey orders at night. "Four Journeys: Zhong Lu vs. Huitian": "After the team, Liulang slapped his horse and attacked, shot down the trumpet lamp, and his formation was chaotic.

China's modern history material series "Taiping Tianwen: The march must always be hungry": "It must be set up.

Interpretation of traffic lights.

A lamp that emits various signals with light. Convey information and display information with different colors of light or intermittent light that is on and off. It is mostly used in transportation facilities, vehicles or electronic equipment, etc.

People's Literature, No. 2, 1979: "It is covered with red, green, blue, and white signal lights in horizontal and vertical rows. ”

Word decomposition Interpretation of letter 信 ì honesty, not deception : credit. Abide by.

Token. Letters. Vow solemnly.

do not doubt, think reliable: trust. Fiduciary.

Confidence. Belief. Worship:

Tuansun Faith . Believer. Message:

Information. There was no news. Correspondence:

Correspondence. Letterhead. Homing pigeon.

Petition. Explanation of the signal light used at night in the army to convey orders or report military information is explained in detail.

A lamp used in the army to convey orders at night. "Four Journeys: Zhong Lu vs. Huitian": "After the team, Liulang slapped his horse and attacked, shot down the trumpet lamp, and his formation was like chaos.

China's modern history data series "Taiping Tianwen: The General Essentials of the March": "It must be established.

Answer: Traffic road lights are signs for motorized, non-motorized and pedestrian roads to maintain road traffic safety and smoothness. Traffic lights are composed of red, yellow and green, with red lights indicating no traffic, green lights indicating permission to pass, and yellow lights indicating warnings. Legal basis: Article 25 of the Road Traffic Safety Law of the People's Republic of China implements unified road traffic signals throughout the country.

Traffic signals include traffic lights, traffic signs, traffic markings, and the command of traffic police. The setting of traffic lights, traffic signs, and traffic markings shall comply with the requirements and national standards for road traffic safety and smoothness, and be kept clear, eye-catching, accurate, and intact. According to the needs of traffic, road traffic signals shall be added, replaced, and updated in a timely manner.

Additional, replacement, and renewal of restrictive road traffic signals shall be announced to the public in advance and widely publicized. Article 26 Traffic lights consist of red, green and yellow lights. A red light means no traffic, a green light means permission to pass, and a yellow light means a warning.

1. Red street lights.

When the red light is on, it means that the road cannot be passed at this time, when the green light is on, it means that the matter can pass through the road, and when the yellow light is on, it means that if the car has already driven through the stop line in front of the red road light, it can continue to communicate, otherwise it can only wait for the next green light to pass.

2. Signal light.

Signal lights can be transmitted to people warning, prohibition and other signals, signal lights can strengthen road traffic management, reduce the occurrence of traffic accidents, improve the efficiency of road use, improve traffic conditions an important tool, including indication signs, warning signs, prohibition signs, guidance signs, tourist area signs, road construction safety signs and auxiliary signs.

3. Lights. When the tail light of the car is on, it means that the owner has stepped on the brakes, and the car should slow down or stop;

When the turn signal of the car is on, it is a reminder to the person behind you that the car is about to turn and please slow down.

4. Navigation lights.

At night, navigation lights are hung on the mast of the ship, on the stern and on the left and right sides of the ship, and the navigation lights are to tell the ships that are sailing at night in the distance that the ship is moving and must not be bumped into in the dark.

5. Turn the lights outside the hair salon door.

Many hair salons have two rotating lights installed outside the door, and this is the exclusive decoration of the hair salon, which can tell people that this is a hair salon.

Traffic lights refer to fixed warning signs that control traffic signals in red, yellow, green, and three colors, and issue guidance or instructions to road traffic participants.

The colors of traffic lights have different meanings: red means no traffic, yellow lights indicate warnings, and green lights indicate passability.

1) When the green light is on, vehicles and pedestrians are allowed to pass, but turning vehicles are not allowed to obstruct the passage of vehicles going straight and pedestrians who are allowed to pass;

2) When the yellow light is on, vehicles and pedestrians are not allowed to pass, but vehicles that have crossed the stop line and pedestrians who have entered the crosswalk can continue to pass;

3) When the lights of Hongxiang Town are on, vehicles and pedestrians are not allowed to pass;

4) When the green arrow light is on, the vehicle is allowed to pass in the direction indicated by the arrow;

5) When the yellow light flashes, vehicles and pedestrians must pass under the principle of ensuring safety.

6) Vehicles turning right and vehicles going straight without a crossing on the right side of the T-shaped intersection can pass without obstructing the passage of vehicles and pedestrians who are allowed to pass when the provisions of (2) and (3) of the preceding paragraph are met. The provisions of the preceding two paragraphs also apply to persons who walk in formations and ride livestock.

Lane Light Signal:

1) When the green arrow light is on, the lane allows vehicles to pass;

2) When the red fork light is on, the lane is not allowed to pass through the vehicle;

Crosswalk light signal:

1) When the green light is on, pedestrians are allowed to cross the crosswalk;

2) When the green light flashes, pedestrians are not allowed to enter the crosswalk, but if they have entered the crosswalk with the vibrato, they can continue to pass;

3) When the red light is on, pedestrians are not allowed to enter the crosswalk.