Transportation on land

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Across
  1. 3. - Underground passage for vehicles (6 letters).
  2. 6. - Major road designed for fast traffic (7 letters).
  3. 7. - Structure built to span physical obstacles like rivers or valleys (6 letters)
  4. 11. - Round object that allows vehicles to roll (5 letters).
  5. 12. - Engine that pulls trains on tracks (10 letters)
  6. 14. - A horse-drawn vehicle used in the past (7 letters).
  7. 15. - Ancient vehicle with two wheels and drawn by horses (7 letters).
Down
  1. 1. - Self-propelled vehicle for personal transportation (9 letters).
  2. 2. - Pioneer of the locomotive and railways (10 letters, last name).
  3. 4. - A four-wheeled vehicle used for transporting goods (5 letters)
  4. 5. T - Henry Ford’s affordable car that changed the auto industry (6 letters).
  5. 8. - Tracks used by trains for travel (8 letters).
  6. 9. - Inventor of the first practical automobile (4 letters, last name).
  7. 10. - Founder of Ford Motor Company and innovator of assembly line production (4 letters, last name)
  8. 13. - Two-wheeled vehicle powered by pedaling (7 letters).