The new Amalyn housing development in Bethesda is between Interstate 495 and the Interstate 270 spur. This means it gets road noise. A partial solution is to install a sound wall, and that is what is happening right now on the outer loop of I-495. Construction on the wall started in June of 2024 and is getting close to being completed.
If you drive along I-495 between Fernwood Road and Greentree Road, you have probably been noticing the construction as it progresses. In places the wall is very close to the road.
This is the current end of the sound wall, next to Greentree Road.
Here at the end of the barrier, it is set a couple of feet below ground level. Most other parts of it are near the surface.
Here's the wall as seen from the other side of the interstate. There is an access door in the wall.
They weren't actively working when I was there but the equipment is waiting for them to return. Greentree Rd is on the right.
