Possible Clues:

• Birds: Lat.
• Madison and Fifth, in N.Y.C.
• N.Y.C.'s 5th and 7th, e.g.
• Pennsylvania and Madison (Abbr.)
• Class that's for the birds
• Classical birds, one of which could be found in company of 10
• Some cross sts
• Fifth and Sixth, in NYC
• Rtes. often numbered
• City rtes