Metro and mass transit systems

I was wondering one day just how many city Metro systems there are in the world. Plenty of these have been built recently, which is encouraging. They really boost a city and encourage growth.

What is also striking about this list is plenty have been built around 100 years ago so it’s not a new thing. They have helped these cities grow and develop and reach out to neighbouring towns and villages.

On a separate Wiki page is a list of the worlds tram systems. Trams were replaced by buses in lots of cities as they are more flexible, not needing tracks to run on. However, there are plenty still going and being electric are greener than buses, they are an asset to any city. I hope to see more of these throughout the world in the future!