WHAT IS THE USAGE AIM OF TRAFFIC LIGHTS
Vehicles and people are so important in traffic because all of thems actions effect the other one. Each one must guess to others action and act according to it. It is too difficult of course.
Traffic signs help to guess other actions. for example if red light is turn on we know that vehicles are stopped or if a car give right signals we know that it turns to right from the next crossing.
Traffic is rid of ambiguity by the signs , we take cautions for against dangers.
Traffic signs are the common language for drivers and pedestrians. So everbody must learn and apply this language for the traffic safety.