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 Somerville Journal: Green Line options September 30, 2004 Somerville News: Green Line meeting March 16, 2005 STEP Green Line map updated April 11, 2009