Details on Green Line retaining walls and noise barriers Post published:May 30, 2012 Post category:Green Line MassDOT has posted its presentation on retaining walls and noise barriers, from the May 22 public hearing. You Might Also Like Green Line contracts ended as state considers next steps December 10, 2015 New detailed plans for the Community Path January 18, 2019 More coverage of inadequate transportation funding plan, including potential veto April 4, 2013