What is the Meaning & Definition of traffic lights

The traffic light is one of the most characteristic elements of the streets of any city in the world and one of the most important traffic signals that we must pay utmost attention since its mission is to regulate vehicular traffic and pedestrians.
I.e. through all three lights that feature and that light Alternately, automobiles and pedestrians they know, if they have to stop, if they should be alert because they have little time to travel or if they have to travel on route or path by which make it.
Green color means that the car can travel roads at speeds and with requirements for the rest of the rules, when changes to the yellow color indicates to the motorist that should lessen their March because it will soon be the red light which indicates that it must stop the March because the street crossing is that from that moment will be free-wheeling and pedestrians will also have the possibility of cross the street by the corresponding pedestrian path.
The latter is extremely important that you follow because the car should stop just before or in the stripe that anticipates the pedestrian path, so then when the traffic light changes from green to yellow, the motorist should be alert to red change is imminent and then must go to lessening their March to stop before reaching the pedestrian path.
On the other hand, there are traffic lights whose mission is to guide pedestrians, for example, the ideal is that when you are in the role of pedestrian check them with care and detail. Normally presents the figure of a person walking and when he meets on transparent light indicates the pedestrian can cross without problems because the traffic is stopped and has step; When the gingerbread man stands and blinks red pedestrian warned that you should hurry up because soon it will change the signal to the man stood, fixed and illuminated with red light that indicates not to cross in any way.
Of the above then it is clear that disregarding a traffic light signals constitutes a very serious road failure which can be plausibly of be punished by a penalty involving money or withdrawal of the license of the driver, depending on legislation and the repetition of mistakes.