1. Yes, many subway trains are double-decked, offering more space and comfort.
2. Absolutely, dual-deck subways are common in cities like London and Tokyo.
3. The London Underground, for instance, is well-known for its double-decker trains.
4. Double-deck subway cars provide more room for passengers, making them quite popular.
5. Yes, the New York City subway has both single and double-decker trains in service.
相关问答：
- How do double-deck subways compare in capacity to single-deck ones?
- Are all subway systems around the world equipped with double-deck trains?
- What are the advantages of traveling in a double-deck subway train?
- Can you tell me about some cities that have the most impressive double-deck subway systems?
- Are there any safety concerns when using double-deck subway trains?
