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 Boston Globe: Missed Green Line deadlines January 11, 2009 State’s press release on DEIR October 21, 2009 “Somerville by Design” planning initiative envisions Green Line Extension October 10, 2012