Green-Yellow-Red-Green For color blind people the traffic light would be upright and from top it would be. Red Yellow Green. http://wiki.answers.com/Q/What_is_the_standard_s.....
Garrett Morgan who was born between 1877-1963 was the inventor of the traffic signal. He was a businessman and inventor from Cleveland, Ohio. Garrett is best known for inventing th... http://answers.ask.com/Society/History/who_inven.....
Traffic Signal contain a circuit which is a basically timer circuit. It changes between the status of lamps as per predefined time period. http://answers.ask.com/Consumer_Electronics/Othe.....
