Related Clues:

• King's title: Abbr.
• Interstate sign: Abbr.
• A.A.A. suggestion
• Hwy.
• Father, for short
• Homophone of 42-Across: Abbr.
• Prepare to drag
• Get moving, with 'up'
• Tpke.
• Road map abbr.
• Atlas abbr.
• Way to go: Abbr.
• Map abbr.
• A.A.A. recommendation
• Put the pedal to the metal