Home » General Knowledge » Who invented traffic signals? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 Students CBSE Exams.

Who invented traffic signals? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 Students CBSE Exams.

Who invented traffic signals?

The first traffic controllers were foot patrolmen. Initially they directed traffic using their hands and later they used hand-operated traffic lights. In the early 1920s automatic traffic lights were used for the first time. In 1927, traffic-actuated controllers were patented. These traffic lights could adjust to the traffic passing through an intersection at a particular time.

Related posts:

GK Question "Which Varieties of Snakes Are Poisonous?" general knowledge book English 2021 current a...
General Knowledge
Why do pipes crack when the water in them turns to ice? Complete General Knowledge Question and Answ...
General Knowledge
How is humidity measured? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 1...
General Knowledge
What is yellow fever? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 an...
General Knowledge
What causes lightning? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 a...
General Knowledge
Why do our ears ring sometimes? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9,...
General Knowledge
Do you know “Largest mural painting in Asia”.
Do you know
What is pollination? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and...
General Knowledge
What is granite? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 ...
General Knowledge
GK Question "How Did We Arrive At Our System Of Measurement?" general knowledge book English 2021 cu...
General Knowledge
Do you know “Shata Tantri Veena”.
Do you know
How do primates communicate with each other? Complete General Knowledge Question and Answer for Clas...
General Knowledge
GK Question "How Electricity Is Produced By A Battery?" general knowledge book English 2021 current ...
General Knowledge
Who carved the faces on Mount Rushmore? Complete General Knowledge Question and Answer for Class 6, ...
General Knowledge
What is a weed? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 S...
General Knowledge
When did dinosaurs die? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 ...
General Knowledge
How does cement harden? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 ...
General Knowledge
Why do tidal waves occur? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 1...
General Knowledge
GK Question "People Have Been Last Names, For How Long?" general knowledge book English 2021 current...
General Knowledge
How is rope made? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12...
General Knowledge

About

Leave a Reply

Your email address will not be published. Required fields are marked *

*
*

This site uses Akismet to reduce spam. Learn how your comment data is processed.