Green Line maintenance facility and air rights Post published:October 9, 2008 Post category:Green Line Somerville News: “Up in the air! It’s the city’s development future” You Might Also Like Draft of Regional Transportation Plan (RTP): Journey to 2030 February 26, 2007 Boston Globe: Green Line and Somerville squares February 15, 2009 1945 map of expanded MBTA September 8, 2013