Related Clues:

• They go through the USA
• GPS data: Abbr.
• 42nd and Elm (Abbr.)
• 22 of the 26 letters of the alphabet, in D.C.
• Major rds.
• Rtes. for bikes
• Canonized grp.
• They may develop ruts: Abbr.
• Fork sites?: abbr.
• They may be dirt: Abbr.
• Some ways: Abbr.
• MI and LA
• Lines on GPS displays
• Lines on a city map: Abbr.
• John, Paul, and George, but not Ringo: Abbr.