City Planners : Will Mumbai follow London?

Daily Prompt : City Planners

If you could clone one element from another city you have visited — a building, a cultural institution, a common street food, etc. — and bring it back to your own hometown, what would it be?
 Lancaster_Gate_tube If there is one thing I want my home city, Mumbai in India, to have is the London Underground / Tube.  I was in London few years back and I was amazed at the efficiency and comfort of the London Underground or The Tube as Londoners call it.
Like London, Mumbai has excellent public transportation.  But the way the Tube is all underground and not showing up above land in Central London shows the planning that has gone into its creation.  It’s there for convenient transport (in Central London from one street to another) but not seen.  What we see is all open, beautiful spaces.
Wish Mumbai had done something similar with its railway lines when they were getting created.  Or even when they were creating new lines which they have added in recent years.  When I had mentioned this to my colleagues in London, they found it funny as they felt the Tube is just not on time, overcrowded, all negative comments.  But, really just think about the meticulous planning.
The Tube was conceptualized almost 150 years ago and it has been in use for over 100 years.  It’s still the best way to get around London.  Very futuristic of the City Planners I would say.