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Underground Passageways and Transit Systems
A crossword exploring important terms and concepts related to subterranean travel routes and underground transit networks.
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Across
  • 1. Vertical tunnel leading to a mine
  • 2. System providing fresh air underground
  • 4. Armored underground vehicle used in tunnels
  • 7. Moving staircase found in underground stations
  • 9. Single rail elevated or underground transit
  • 12. Main hall connecting subway lines
  • 13. Urban underground train system
  • 15. Historic underground burial passage
  • 17. Area where passengers board trains
  • 18. Structure controlling water in tunnels
Down
  • 3. Existing or situated below the earth's surface
  • 5. Man-made underground passage for travel
  • 6. Steep slope encountered in underground routes
  • 8. Urban rail transit often operating underground
  • 10. Electric underground rail system
  • 11. Road or walkway passing beneath another
  • 14. Rails on which underground trains run
  • 16. Strong underground shelter resistant to explosions
  • 19. Complex underground tunnel system
  • 20. Vertical passage to underground levels

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