Category metro

Here are some popular categories related to the metro:

1. Metro Systems: Information about metro systems around the world, including routes, stations, and operating hours.
2. Metro Maps: Visual representations of metro systems, including maps, diagrams, and illustrations.
3. Metro News: News and updates about metro systems, including construction, expansions, and service disruptions.
4. Metro History: The history of metro systems, including their development, evolution, and impact on cities.
5. Metro Technology: The technology used in metro systems, including signaling, communication, and automation systems.
6. Metro Operations: The day-to-day operations of metro systems, including maintenance, cleaning, and customer service.
7. Metro Planning: The planning and design of new metro systems, including route planning, station design, and infrastructure development.
8. Metro Culture: The cultural significance of metro systems, including their impact on urban culture, art, and architecture.
9. Metro Tourism: Information about visiting metro systems, including guided tours, attractions, and experiences.
10. Metro Transportation: The role of metro systems in urban transportation, including their impact on traffic, congestion, and air quality.

Which of these categories is most interesting to you?