Just how the Rube previously had no indication he was on the street other than the music, the fact that a DNA cluster is on a street is not alerted to the player unless they can hear it. I am sure there is more than a few deaf players, as well as those who may choose to play without the sound on.
Can a simple message be added to local chat when you enter a street with a DNA cluster, similar to how one was added to alert players of the Rube?