Some people have no idea about the colors of traffic lights. They do not know how to deal with them. As a result, they cause confusion or problem for themself and others. If you also have no knowledge about these traffic signals this guide is for you.

We will tell you about standard colors of traffic lights and their exact meaning. You will also see their different colors in other countries which will be very surprising for you.

History of Traffic Lights

Flashing traffic signal lights are a type of traffic lights which you notice on the road everyday . But they were not invented recently. Instead, the origin of traffic lights occurred in 18th century.

First traffic light in the world: It was introduced in December 1868 in London from manually operated gas lanterns which were modified with the passage of time. Now you see them in electrical and computerized systems with standard lights.

Traffic Light Colors Meaning

You find traffic lights mostly in three colors which are red, yellow and green. Basically, these traffic signals are used to maintain the traffic flow on the road. They also protect you and other road users from accidents. The order of traffic light colors are as follows which you should know.

Red Traffic Light

If you see flashing red traffic lights then you must stop. It tells you to stop your vehicle completely. It remains red until pedestrians are passed through the road. You have to wait for their navigation. After their crossing, the light turns green. It is the sign for you to proceed.

These traffic signals are mostly present at intersections, crosswalks and school zones. So, you should remain more careful at these places. If you cross the road against a red light then it will be a violation of traffic rules. As a result, you must pay a fine. There is also a chance of an accident in doing this adventure.

Yellow Traffic Lights

Flashing yellow traffic lights come after the red light. It means you get ready to cross the road. It gives you an alert sign that the vehicle's movement will start after this light. So you need to get ready for the next step and keep your attention on the road. Do not divert your focus from traffic signals.

Yellow traffic lights usually last for about 3 to 6 seconds. But its exact duration depends on the road’s speed limit and local traffic regulations. In short, after seeing yellow light you should close your other activities which you start during red light. You have to prepare yourself to proceed.

Green Traffic Lights

After the yellow light, you will see a green light which tells you to pass the road. It is considered a safe sign for crossing. Green traffic lights turn on when the path is clear from pedestrians and you can move easily. You should also be active at this light because all vehicles start to proceed down the road.

On busy highways, you will notice their time up to 120 seconds but in urban areas it lasts from 10 to 60 seconds. In this way, it is enough time for you to pass through to your destination safely. This traffic light helps you in saving your fuel consumption and vehicle emissions. It also decreases your travel time.

Why Are Traffic Lights Red, Yellow and Green?

The main reason for using these colors in traffic lights is that they have a historical background. These colors first evolved in the 19th century from the railway system. Then they are modified with the passage of time but their colors do not change.

Traffic Light Colors Around the World

You will find traffic signals red, yellow and green across the world. But some countries have variations in traffic lights. It will be very interesting for you to know this thing.

Traffic Light Colors in Australia

In Australia, traffic lights have three color systems which have a red, yellow and green sequence. You can see their yellow color change with orange which is also called amber. But the rules of these colors are the same. As, red for stop vehicles and amber is used for alert drivers to prepare. While green gives a go signal to you. These traffic signals ensure your safety on the road.

US Traffic Light Colors

If you are from United States then you have an idea about traffic sign colors. Basically, you will notice general traffic signal colors there. Traffic lights have red on top then yellow and green at last. These lights are regulated by the Federal Highway Administration MUTCD to ensure national uniformity. They are also helpful in maintaining traffic flow there.

Traffic Light Colors in Japan

You see blue light instead of green in Japan which indicates go. Because they use red, yellow and blue lights in traffic signals. However, the go light is officially green but appears as a blue (ao). You will find some Japanese traffic signals horizontally which have color order as blue on the left, yellow in the middle and red at right side. These sequences may be vertical.

Uses of Traffic Light

Traffic signals are very useful on the road. You will notice a number of benefits of traffic lights. They give sequence to vehicles and do not cause mass on the road. Some purpose of traffic lights are as follows.

Manage Traffic Flow

Traffic lights play an important role in controlling traffic flow. Due to these light signals, you do not face the problem of traffic jams on the road. They organize the movement of vehicles at intersections and busy roads. This thing protects you and your car from collision with other motors.

Enhance Road Safety

After the installation of traffic lights, you feel safe on the road. You navigate through the crosswalk with confidence. Because these lights stop all vehicles for you. As a result, pedestrians and drivers remain safe from accidents. This thing increases road safety and everyone walks without any fear.

Travel Delay Minimize

Traffic lights help you to reach your destination faster. You do not need to wait for the clearance of the road because they provide a continuous flow of traffic. This thing gives you a safe way to drive. Traffic signals allow drivers to move in a sequence which makes the road clear for other road users.

Support Emergency Vehicles

You can notice that some countries have special systems in their traffic lights which give way to emergency vehicles. If an ambulance or fire trucks come then traffic lights change to green and allow them to cross the road first. As a result, they reach their locations at a time and do not delay.

Traffic Light Rules

If you see a traffic light in your way then you should follow safety rules to cross it safely. These regulations will protect you and others from accidents. Given below are the safety measures which you can follow as a road user.

• Firstly, you have to stop before crosswalks when the red light is on. You need to wait for its change.

• If you find a flashing red traffic light then you should consider it as a stop sign. You need to stay there and move when the road is clear.

• Then it turns to yellow which shows that you have to prepare yourself for driving. But you should still wait and do not move.

• In case of a green light, you can continue your journey. This sign will provide you a pedestrian free road for moving.

• If there is no traffic light or off due to power outage then you need to follow a four way stop at intersections.

• You should check on both sides of the road. If there is foot traffic then let them cross. You can move when it is safe to proceed.

Traffic Light Color Blindness Considerations

Some people do not distinguish traffic light colors, especially red and green. It is due to the reason that they have color vision deficiency (CVD). So, some adaptations are made which help them to identify colors correctly.

Memorize Position

You should remember their positions because they have the same order of sequence and do not change. Traffic lights are mostly designed as red on top, yellow in the middle and green at last. In a horizontal way, they may be left to right or from right to left. It depends on your region.

Brightness Clues

You can also recognize them by their color brightness. You notice that red and yellow LED lights produce more luminosity as compared to green light. While green lights give you a bluish green (cyan) signal which you identify easily. As a result, you differentiate them.

Symbol Variations

For the facility of blind people, specific traffic signs are used. They are designed in a way that they show them what to do. For example: to stop a raised hand sign is used. While a walking figure is applied for giving them a go signal. These electric signs help them to cross the road safely.

Assistive Technologies

Some modern features are also introduced for those people. You can use color blindness glasses such as EnChroma to see them properly. Plus, some apps give you real time audio descriptions about traffic signals. These things are very helpful in decreasing your color problem.

Traffic Light Color Placement Standard

You will find traffic light colors in the same sequence which is universal. It helps all drivers including color blind road users to identify them easily. This information is useful for you as well in case you are a traffic light installation company and want to make sure compliance.

Frequently Asked Questions

Is it illegal to Run a Yellow Light?

If you cross a yellow light then it is not generally illegal. But speeding up to pass the road before a red light is considered a violation of rule. So, the best way is that you should stop and wait for it to turn green.

When a Traffic Light is not Working?

In case you find a traffic light dark, you need to stop first. Then check on both sides of the road for traffic. If there is no everywhere then you can cross the road. But at intersections, you need to be more careful.

How Long can a Red Light Stay Red?

You can notice that the red light remains on for up to 30 - 60 seconds. However, its exact time depends on traffic density, pedestrian crossing and junction layouts. It can also stay red permanently due to default in the sensor.

Can Emergency Vehicles Change Traffic Lights?

Yes, they can alter the traffic lights according to their need. Emergency vehicles have traffic signal preemption (EVP) systems. Their transmitter communicates with sensors of traffic lights to turn light green for passage. While remaining red for other traffic.

Wrapping It Up

In the end, you have a clear understanding of the traffic light colors and their meaning. After knowing their importance, you should take care of these traffic signals now. So that you and others remain safe on the road.

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