Roads

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Across
  1. 5. What bridges go over
  2. 6. Flat road crossing
  3. 9. Road with no intersections
  4. 11. What traffic light color tells cars to stop
  5. 14. How roads go over rivers
  6. 15. What notifies cars of something interesting ahead
  7. 17. A circular intersection
  8. 18. What tunnels go under
  9. 19. Primary road
Down
  1. 1. Getting ahead of the next car
  2. 2. Where people drive
  3. 3. 2 parallel one way roads
  4. 4. What traffic light color tells cars to go
  5. 7. Emergency stopping lane
  6. 8. How to exit freeways
  7. 10. What separates divided highways
  8. 12. How roads go under land
  9. 13. Not flat road crossing
  10. 16. What crosses roads