Regarding “The I-81 project will add miles and miles of noise barriers. How did the state decide where they should go?” (Aug. 15, 2024):. The concrete highway noise barriers that have been constructed are cold-looking and have a “prison wall” feeling. Couldn’t highway noise reduction have been achieved by use of dense evergreen vegetation? Where space permits, please plant evergreen vegetation to hide the barriers. Where space is limited, please plant green ivy to grow up the barriers.