Metro Rail and City Rail Maps

I traveled on Delhi Metro for the first time today and I loved it. The locos themselves are world class and the elevated stations are chic. I'd traveled on Calcutta Metro, Tokyo Metro, Osaka Metro, London Tube and New York Subway so far. Most of these are underground(for most part of the routes). After commuting on Delhi Metro I understood why people idolize E. Sreedharan :)

A lot more metro lines have to be added. India's Metro routes (existing Kolkata and Delhi) are very less dense compared to international metros. Please see the pictures below and compare:

Delhi Metro Map (click on maps to expand)

Existing Kolkata Metro Route.

Planned Kolkata Metro Route.

Please note how dense Tokyo Metro Rail Routes are. Almost every mile of the city is covered by Metro.

London Underground Rail Map.

It is not only the metro rail route density which is low in India. Even Local train routes too need to have greater coverage of the city. Please see the maps for Mumbai and for similarly sized cities of Japan.

Mumbai Local Train Map

Tokyo Local Train Map (Local Trains run on the ground and are operated by JR) Metro runs underground

Osaka Local Train Map (Osaka also has an underground Rapid transit Metro rail system)