Related Clues:

• 66 on a map, e.g.: Abbr.
• Back muscle, in gym lingo
• G.P.S. suggestion
• Backwoods hwy.
• 66, for one: abbr.
• U.S. hwy., e.g.
• Interstate sign abbr.
• Opp. of longitude
• I-5, for one
• 66, for ex.
• Pec neighbor
• Address abbreviation, perhaps
• Back muscle, familiarly (m)
• Interstate abbr.
• GPS suggestion