What is the best way to lessen noise caused by traffic?

Using bushes as a method to lessen noise caused by traffic is effective due to their ability to absorb, deflect, and diffuse sound. Dense foliage can create a barrier that interrupts sound waves, making it more challenging for noise to travel unobstructed. The varying heights and thickness of bushes also contribute to sound absorption, as the irregular shapes help to scatter noise, reducing its intensity.

In contrast, while tall trees can also serve a purpose in noise reduction, they may not be as effective in smaller urban settings where their height does not match the noise source. Ground grass covers provide limited sound insulation and primarily serve aesthetic or ecological functions. A 3-foot wall may offer some physical barrier, but its height is insufficient to provide significant noise reduction compared to the ability of thick, densely planted bushes to mitigate sound more effectively. By integrating shrubs strategically in landscaping, a more comprehensive solution for noise reduction can be achieved, promoting a quieter, more tranquil environment in areas affected by traffic.