In 2004, the Manhattan Bridge reconstruction project was completed, and the W was replaced with an extended train, running over the bridge at all hours and express on Fourth Avenue except late nights. D service was moved to the West End Line instead of returning to the Brighton Line, where it ran on from 1967 to 2001, because West End Line residents from Chinatowns in Brooklyn wanted full-time access to Grand Street, on the Sixth Avenue Line in Manhattan's Chinatown. This also eliminated the need to run late-night and/or weekend shuttles on either the Concourse Line or the West End Line.
