was short-lived, ending with closure of the portal on April 6, 1962. The Pleasant Street portal is now covered by Elliot Norton Park at the intersection of Tremont Street, Shawmut Avenue, and Oak Street West. Proposed reuse Reuse of part of the tunnel for the Silver Line Phase III was briefly considered, but the narrow bore was found too small for the Silver Line buses which (unlike trolleys) are not fixed to their guideway. Plans for the Phase III tunnel were shifted further west to new alignments, then canceled due to questions over the project's cost-effectiveness. The 2003 Program for Mass Transportation included the possibility of converting the Washington Street section of the Silver Line to to light rail (as had originally been promised) using the abandoned southern section of the subway to connect to the central subway at Boylston. However, the Phase III tunnel and continued bus service was recommended instead. In 2012, the Roxbury-Dorchester-Mattapan Transit Needs Study recommended the conversion to light rail and reuse of the tunnel as a long-term project, with the additional possibility of extending the line down Blue Hill Avenue to Mattapan along the # route. References rtspcc, Questions about history of the Boston subways/els, ne.transportation May 2–3, 2005 NETransit: 100 Years of the Tremont Street Subway Green Line (MBTA)