Why do traffic lights blink at night?

At night, in many areas, there is far less traffic. Having a traffic light blinking red for all intents and purposes turns it into stop sign. Having the blinking light helps the only car on the road in a one mile radius by not having to stop at a red light for two minutes while no other traffic is in the area.



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Traffic lights aren't the same all over the planet. Some are to the right of the road. Others hang in the middle of intersections. However, almost all over the world, green means go, yellow means caution (and not “step on the accelerator before the light changes”), and red is a mandatory stop.

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