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 Roundup of Green Line coverage March 22, 2022 The full Green Line Extension is open! December 12, 2022 Press coverage of Green Line stops May 7, 2008