Related Clues:

• Peter and Paul: Abbr.
• Blvds.
• Aves.
• Downing and others: Abbr.
• Thoroughfares: Abbr.
• Map rtes.
• Map entries: Abbr.
• Blvd. crossers
• Most letters in D.C.
• Ave. crossers
• Peter, Paul and Mary: Abbr.
• Abbr. concerning the holy or 'potholy'
• Patrick and Paul: Abbr.
• They're numbered in NYC
• D and C, in D.C.