The "E" Branch or Arborway Branch is a streetcar line in the Boston, Massachusetts area, operating as a branch of the Massachusetts Bay Transportation Authority Green Line. Since 1985, service beyond Heath Street has been "temporarily" suspended, with the 39 bus providing service beyond. The part leading from Brigham Circle to Heath Street is the only remaining section of street-running tracks in regular use by the MBTA; all other lines are on private right-of-way or in medians. The Commonwealth of Massachusetts has entered into various binding agreements over the years to restore the part of the line between Heath Street and Arborway, but as of June 2006, still has not done so. Many residents are actively pursuing this segment's return.