Traffic Light

Amsterdam, the capital of the Netherlands and the country's most populated city, is launching a new trial with LED lighting at intersections. Thanks to this remarkable lighting, it is aimed for cyclists to see the red light more easily and to prevent accidents.

There are many concept designs for traffic lights on the internet. Nowadays, it is technically possible and cost-effective to put all colors in a single traffic signal light module. So why are three separate light modules still used for three different colors?

Color is very important in traffic lights. Red, yellow and green each color has a different meaning. In almost all cases, the red light is at the far left in horizontal traffic lights and the red light is in the top in vertical traffic lights. So color blind people can...