New Metro Lines : Smooth sailing on Day 1; Litmus test on Monday Mumbai Metro 2A and 7 line record ridership over 1 Lakh on Day 2 Mumbai falls in love with metro rides, 2A and 7 off to a flying start The Blue Line is part of the Namma Metro rail network for the city of Bangalore, Karnataka, India. It consists of two sections - Phase-2A (Central Silk Board to Krishnarajapura) and Phase-2B (Krishnarajapura to Airport). Delhi Metro Blue Line Route Map - Map showing the metro stations lying on blue line connecting Noida Electronic City/ Vaishali and Dwarka Sector 21.