If you haven't noticed, I've got a bit of a thing for signage.  I've been using the parking signage for years originally as a reference to our car culture and had a whole series of parking garages.  More and more I'm just using the signage elements as graphic elements, and one other thing to think about when you as a viewer look at a piece.  The figures have a relationship to each other and the signage brings another compositional relationship.