Mumbai’s local railway is aptly nicknamed the “lifeline of the city.” Mumbai is one of the densest cities in the world and the trains are its saving grace, transporting a staggering 6.9 million people per day. Trains can get so overcrowded during peak hours that it is common to have 14-16 people per square meter. If this sounds intimidating, don’t worry, after reading this guide you will have all the information to conquer the Mumbai local trains.