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 Notes from Gilman Square & Lowell St stations design meeting June 5, 2013 MBTA purchases new trains for Green Line Extension to Union Square February 20, 2017 Somerville Journal on Union Square & Washington St Green Line meeting February 10, 2012