Related Clues:

• Post office chart: Abbr.
• Map lines: Abbr.
• Many begin with I: Abbr.
• Itinerary info
• Hwy. turnoffs
• Fork providers?: Abbr.
• Carriers' paths: Abbr.
• Some people pass on them: Abbr.
• St. and ave.
• U.S. hwys., e.g.
• Circuits
• Interstate syst.
• I-80 et al.
• Expys.
• AAA suggestions