Some Tukwila residents are complaining about high noise levels from the elevated Light Rail tracks. The KOMO report seems to indicate that Sound Transit is going to mitigate it with either a sound wall or by soundproofing homes.
Oran recently took some video that might be useful for people to understand the noise levels on MLK, as compared to the general din of traffic. As someone who lives a couple of blocks away from MLK, the noise is distinctive from the traffic noise, if not noticeably louder.
Certainly the bell is the part that’s most distinctive: