World's 11 best metro rail systems

Underground subway systems, or metro rail systems, are among the fastest and cheapest mode of urban transport.

In India only Kolkata and New Delhi currently have a metro rail system, but many other Indian cities too will soon have metros. Among them are Bangalore, Hyderabad, Chennai, Goa, Pune, Amrtisar, Jalandhar, Ludhiana, Noida, Thane, Chandigarh, Ahmedabad, and Kochi.


Meanwhile, here are the world's 11 most popular international underground transit systems. . .

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