Green Line bridge construction underway Post published:May 6, 2013 Post category:Green Line Phase I work is underway, including utility work and excavation support work northeast of Harvard Street Bridge in Medford. You Might Also Like “Somerville by Design” planning initiative envisions Green Line Extension October 10, 2012 Important Green Line public meeting Monday! March 11, 2005 Federal approval of State Transportation Improvement Program October 30, 2009