Related Clues:

• Travel rep's concern
• Offering G.P.S.
• Artery: Abbr.
• 47-Across, e.g.
• Rural address abbr.
• MapQuest.com abbr.
• Flight plan info
• 1 or 66, e.g.: Abbr.
• GPS calculation
• Road map line: Abbr.
• 66, famously: Abbr.
• Road no.
• Rural env. abbr.
• U.S. 1, for one
• Tpk., e.g.