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Why red, yellow, and green are chosen for traffic lights

Image credits: Freepik

Standardization

Red, yellow, and green are universally recognized colors, ensuring consistent traffic signals across different countries and regions.

 

Image credits: Freepik

Visibility

Driver safety is increased by these colors since they are readily visible against a variety of backgrounds and in a range of lighting conditions.

 

Image credits: Freepik

Color Perception

Red is thought to be the color that draws attention the most, alerting cars to stop quickly and guaranteeing safety.

Image credits: Freepik

Color Meaning

Red universally means 'stop', green means 'go', and yellow indicates 'caution', simplifying driver understanding and decision-making.

 

Image credits: Freepik

Contrast

Red, yellow, and green have different wavelengths, it is easier to distinguish between them and less likely that people will become confused.

 

Image credits: Freepik

Behavioral Cues

Drivers' actions are guided in a smooth and safe manner by the predictable sequence created by the progression from red to green through yellow.

Image credits: Freepik
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