Question

Some traffic lights have timers to show how much time is left for the light to change color. For example, in the image shown here, the number 48 indicates that after 48 seconds, the red light will turn green.
How does such a timer help?
It allows people to save fuel by switching their vehicles off.
It helps the policemen catch people who break rules at the crossing.
It helps people to know the amount of traffic at the crossing at any time.
It allows the policemen to measure how fast the vehicles are moving at the crossing.

Answer 1

Ans

It allows people to save fuel by switching their vehicles off.

Explanation

Because it is made for many use but mainly for saving fuels and maintaing the traffic