What the hey? LD

I see interesting signs all over Italy.  Recently I noticed this heavily covered-with-stickers street sign located on Ponte Santa Trinita.  I feel sorry for any drivers who need to know that the road slants to the left as the cars exits the bridge!

But, about the stickers:


I noticed on that says “LD.”  I’d love to know what that refers to, because these are my initials too.