Mumbai local trains carry 6.1 million passengers daily
Mumbai’s local trains are popularly known as the lifeline of the financial capital of India.Carrying more than 6.1 million passengers daily, the local train is the fastest mode of transport available to you. It requires skill, technique and persistence to get in and out of a Mumbai local train.If you have not traveled in a Mumbai local, you have not visited Mumbai, you have not lived, you don’t have any adventure spirit.
http://www.indiamarks.com/take-a-ride-mumbai-local-trains/
They should have been improved instead of wasting thousands of crore on Metro/Mona Rail in Mumbai which no one uses and basically a show off project.