Bensonhurst's Lake Street Sign Sinking

The street signs at the intersection of Lake Street and 86th Street are hanging quite low on the sign pole. The signs are either not attached securely, thus, causing them to slip, or they have been placed there specifically by DOT officials. Whatever the reason, drivers and pedestrians visiting the Gravesend/Bensonhurst neighborhood are confused when trying to figure out the street names.

Does anyone know why these signs would be so low on the pole? Are they just pole dancing very, very slowly?