The initial 11.4km phase of Line 1 from Versova to Ghatkopar opened on June 8 2014 and an average of 260,000 passengers per day now pass through the line's 12 stations. Ridership is expected to increase in line with population growth in the city, which is estimated to be around 4% per year.

Last November Mumbai Metropolitan Region Development Authority (MMRDA) approved the construction of two more lines.

As part of the Mumbai Metro One PPP consortium RATP and Transdev operate and maintain Line 1 under a five-year contract.