関連キーワード
1. France
2. Railway
3. Transport
4. Infrastructure
5. History
6. Development
7. Technology
8. Economic impact
9. High-speed train
10. Government policy
11. Investment
12. Urbanization
13. Environmental impact
14. Rail industry
15. Public transportation
16. Railway regulation
17. Freight transportation
18. Safety
19. Sustainability
20. Market competition
21. Labor issues
22. Passenger experience
23. Funding
24. Maintenance
25. Modernization
26. Political influence
27. Regional integration
28. Tourism
29. Integration with other transport modes
30. Innovation