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.com on Green Line station designs October 10, 2015 Transportation board urged to move forward with Green Line September 11, 2015 Materials from meeting with new Green Line team May 17, 2011