Which of the following is a way to reduce the traffic noise in the highway?
Which of the following is a way to reduce the traffic noise in the highway?

Q. Which of the following is a way to reduce the traffic noise in the highway?

A.            Constructing the vertical barriers

B.            Increase the speed of the vehicles

C.            Using old engine vehicles

D.            Horning in unnecessary time

Answer: Constructing the vertical barriers
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