Related Clues:

• Consciousness starter?
• Highway rumbler
• I-80 hauler
• Circle's beginning?
• Conductor's beginning?
• Hot rod engine, to car buffs
• Weigh station waiter
• Huge truck
• "Circle" or "final" start
• Small home
• It's often used for a long haul
• Sphere header
• Sec starter
• Precious beginning?
• Many-axled vehicle