Why trees planted along the roads reduce noise?

Trees planted along roads can help reduce noise by acting as natural sound barriers. Their leaves, branches, and trunks absorb, deflect, and refract sound waves, which diminishes the overall noise level reaching nearby areas. Additionally, the dense foliage can break the line of sight between the road and residential areas, further muffling the sound from traffic. This combination of physical structure and natural absorption makes trees effective in noise reduction.