 Light rail service on the section of The Embarcadero south of Folsom Street and on King Street to the Caltrain Depot began on January 10, 1998, using a Muni Metro shuttle line between Embarcadero Station and the Caltrain station.This temporary line was designated E Embarcadero, and it was discontinued when it was replaced in August 1998 by an extension of the N Judah line.In 2007 the new T Third Street line also began operating on this extension.