The Millennium Place development, completed in 2001, was constructed on a long-vacant lot surrounding the southbound headhouse. A simultaneous station renovation included a rebuilt headhouse and a new elevator built into the new development. The $5 million project, completed in 2002, made the station fully accessible. Silver Line service on Washington Street between Dudley and Downtown Crossing (now route SL5) started on July 20, 2002. Additional service to South Station (route SL4) began on October 15, 2009. Both routes operate on one-way loops in downtown Boston, serving Chinatown station only in the northbound direction.