Related Clues:

• PO listings
• Bump sites
• Valentine and others: Abbr.
• Some block boundaries: Abbr.
• Wilderness encroachers
• Lines on some maps: abbr.
• Lines on a map
• They're between shoulders
• M and N, in D.C.
• They go around the block, briefly
• City rtes.
• Many are named for trees: Abbr.
• They may get flooded: abbr.
• Elm and Oak, briefly
• City grid: Abbr.