For naught did I study hermeneutics. Traffic signs are shrouded. On the other hand, the parking signs are still far more opaque to me overall. The omission of a district, however, at least lets me roll my eyes immediately; unlike those collections of 4 or more rules about just when I might park, none of which seem quite possible to reconcile with each other.
Note to readers: The form of the quotation “An enigma wrapped in a riddle, shrouded in mystery” seems more mellifluous to me, as well as more familiar. However, the attribution to Winston Churchill of the title form seems convincing, and surprisingly modern.