How Traffic signal works?

Updated: Apr 3, 2019

Traffic signals work in two ways:

1.Vehicle Actuation

2.Fixed time


Vehicle Actuation:

-There are sensors installed either under the road's surface or on top of the light itself.

-The sensor will detect the vehicles passing by.

-If there are more traffic on one side of the road, the signal will remain green

until the traffic is reduced on that particular side.

-However,if sufficient amount of vehicles start to come in the other direction,the signal will go red and the other one turn green.


Fixed time:

As the name suggests,the signal will be green for a pre-determined length of time no matter how much traffic there is.


#trafficlights #traffic

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