Related Clues:

• Greek letters
• Numbered hwys.
• Fraternity letters
• 1 and 66, e.g.: Abbr.
• Tpks.
• Sorority letters
• Nos. on a road map
• LAX info
• Parts of itineraries: Abbr.
• Some fraternity men
• Address nos.
• Hellenic vowels
• U.S. 1 and others
• Tpkes.
• Mail carriers have them: Abbr.