It's a bird! It's a plane! It's a...

1234567891011121314151617181920212223
Across
  1. 3. Airship filled with gas.
  2. 8. Flat-bottom craft for river cargo
  3. 9. It floats
  4. 10. Paid vehicle for private local trips
  5. 11. Self-balancing device with two wheels
  6. 13. Private luxury craft
  7. 14. Small road vehicle
  8. 15. Large sea vessel for goods or people
  9. 17. Water scooter
  10. 20. Fast magnet-powered train
  11. 21. Vehicle for travel beyond Earth
  12. 22. Heavy vehicle for moving goods by road
Down
  1. 1. Train on a single track
  2. 2. Underground train system in cities
  3. 4. It flies
  4. 5. Rail-based vehicle on city streets
  5. 6. Carries people/cars across water
  6. 7. Small boat, doesn't sound promising
  7. 8. Moved by pedaling
  8. 9. Large vehicle for many passengers
  9. 12. Flies without engine.
  10. 16. Mid-sized vehicle for cargo or groups
  11. 18. Vehicles on metal tracks
  12. 19. Small two-wheel vehicle for city rides
  13. 23. Narrow craft moved with a paddle