Bengaluru Metro Pink Line cost crosses ₹1,000 crore per km. Bengaluru Metro’s Pink Line is reportedly set to cost over ₹1,000 crore per kilometre for its underground section, with the project’s overall expenditure rising significantly from its original estimate. Revised figures put the total cost of the 21.26-km corridor at ₹17,346 crore, up from the ₹8,730 crore projected in the Detailed Project Report (DPR).