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 Join the Green Line construction working group November 18, 2017 State updates status report with potential Green Line delay September 6, 2007 A new Green Line blog to watch February 26, 2009