The full Green Line Extension is open! Post published:December 12, 2022 Post category:Green Line Hundreds rode the first trains, music was played, mayors (current and former) danced, speeches were given, and Somerville became an even better place to live on this fine December day! Keep reading for more photos from Karen Molloy. You Might Also Like Richard Davey on Green Line extension March 7, 2012 Boston Globe: City to push back on Green Line delay August 25, 2011 Photos from CCP/STEP station design workshop May 22, 2010