Why is red used as the stopping light at traffic signals?

Meeta father was driving her to the school. At the traffice signal she noticed that each traffic light was made of many tiny lights instead of a signal bulb. When Meeta asked this question to her father's he explained the reason for this. Answer the following question based on above information: (i) What were the values displayed by Meeta and her father? (ii) What answer did Meeta's father give? (iii) What are the tiny light in traffice signal called and how do these operate?

There is a substantial increase in the number of accidents causing deaths and severe injuries due to malfunctioning of the traffic signals. Courses of action I. The traffic police should immediately post traffic personnel at the junctions. II. The signal system should immediately be repaired or replaced.

Why is red colour selected for danger signal lights?

Why is neon used in illuminating warning signal. Why ?

Who patented the three-position traffic signal in 1923?