Bengaluru Metro's Purple Line was fully operational from October 9, without any official inauguration.
The 2.1-km Baiyappanahalli-KR Pura and 2.05-km Kengeri-Challaghatta sections opened to the public at 5 am.
They are part of the Purple Line, which will stretch from Whitefield in the east to Challaghatta in the west and span 42.85 km.