Green Line concepts from Boston Architectural College students Post published:March 22, 2009 Post category:Green Line Students and area residents gathered at SCAT on February 14 to look at Green Line design ideas and discuss the future of Union Square. You Might Also Like MassDOT releases five-year investment plan with Green Line extension January 10, 2014 Maps of some Green Line options October 21, 2004 Somerville Journal: Monday’s public hearing March 10, 2005