What is the difference between a viaduct and an overpass?

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Tags

1. #obstacle
2. #difference
3. #nouns
4. #especially
5. #section
6. #spans
7. #another
8. #while
9. #valley
10. #railway
11. #viaduct
12. #overpass
13. #other
14. #between
15. #obstacles
16. #traffic
17. #bridge
18. #several
19. #carries