As of my last update in September 2021, urban rail transit systems have been implemented in many cities around the world. These systems typically include various types of trains, such as subways, light rail, tramways, and commuter rail, which operate within urban and suburban areas to provide efficient and mass transportation. Since my information is not up-to-date, new systems may have been developed, and existing ones may have undergone expansions or changes. Here are some notable urban rail transit systems around the world as of 2021:
1. New York City Subway (USA): The New York City Subway is one of the oldest and largest urban rail transit systems globally, serving the five boroughs of New York City.
2. London Underground (UK): Known as “the Tube,” the London Underground is one of the oldest and most extensive subway systems, connecting various parts of Greater London.
3. Tokyo Metro (Japan): Tokyo Metro is a comprehensive subway system serving the Greater Tokyo Area, one of the busiest and most efficient urban rail networks in the world.
4. Shanghai Metro (China): Shanghai Metro is one of the world’s largest and most rapidly expanding urban rail transit systems, serving the city of Shanghai.
5. Paris Métro (France): The Paris Métro is an extensive subway system in Paris, known for its iconic art nouveau station entrances.
6. Moscow Metro (Russia): The Moscow Metro is one of the busiest subway systems globally, known for its beautiful and ornate station designs.
7. Seoul Metropolitan Subway (South Korea): The Seoul Metropolitan Subway serves the Seoul National Capital Area and has one of the highest riderships in the world.
8. Beijing Subway (China): The Beijing Subway is one of the longest and most rapidly expanding subway systems in the world.
9. Madrid Metro (Spain): The Madrid Metro serves the city of Madrid and its surrounding areas, offering an extensive network of lines.
10. Berlin U-Bahn and S-Bahn (Germany): Berlin has an integrated system of underground (U-Bahn) and suburban (S-Bahn) trains, providing comprehensive coverage in the German capital.
11. Delhi Metro (India): The Delhi Metro serves the National Capital Region of India and has become a vital transportation system in the city.
12. São Paulo Metro (Brazil): The São Paulo Metro is one of the largest rapid transit systems in South America, serving the metropolitan area of São Paulo.
These are just a few examples, and many other cities around the world have also invested in their urban rail transit systems to address the challenges of urbanization, traffic congestion, and environmental concerns. Remember that new developments may have occurred beyond my last update, so it’s essential to refer to more recent sources for the latest information on urban rail transit systems globally.