Question

What is the necessity of traffic lights?
A. To reduce delays at junctions
B. To reduce vehicular conflicts
C. To reduce accidents
D. For all of these

Answer 1

Hint : Traffic lights, traffic signals, stoplights, or robots are signaling devices used to control traffic flows at road intersections, pedestrian crossings, and other locations. In December 1868, the world's first traffic light was a manually operated gas-lit signal installed in London. It exploded less than a month after it was installed, injuring the police officer who operated it.

Complete step-by-step solution:
In 1910, Earnest Sirrine of Chicago patented the first automated traffic control system. It used the words "STOP" and "PROCEED," but neither was highlighted.
Traffic lights adhere to a universal color code that alternates the right of way granted to users with a series of illuminating lamps or LEDs of three standard colors:
Green Color:
Allows traffic to proceed in the indicated direction if it is safe to do so and there is space on the other side of the intersection.
Red color:
Any traffic is prohibited from proceeding. When a flashing red light appears, traffic must come to a complete stop and then proceed when it is safe to do so (equivalent to a stop sign).
Amber light (also known as 'orange light' or 'yellow light'):
The yellow color indicates that the signal is about to change to red, with some jurisdictions requiring drivers to stop if it is safe to do so, while others allow drivers to proceed through the intersection if it is safe to do so. Some European countries (such as the United Kingdom) display red and amber together, indicating that the signal is about to change to green.
Thus, Road traffic lights are extremely important. It aids in the following ways:
Reducing delays at intersections
To lessen vehicular collisions
To cut down on accidents
To save police officers' time and energy

Note: If the conflict monitor detects a problem, such as a fault that attempts to display green lights to conflicting traffic, traffic signals in some countries will flash. The signal may flash amber to the main road and red to the side road, or it may flash red in all directions. Flashing can also be used at times of day when traffic is light, such as late at night.