When the Luas Green Line was constructed, it was designed to allow metro trains to potentially operate on the line in the future. In the National Transport Authority's Draft Transport Strategy for the Greater Dublin Area 2016-2035, it was proposed that the Metro North tunnel should be extended southwards to meet the Luas Green line in the Ranelagh area. The Luas Green line would be converted to a metro line, with Luas services on the line ending and being replaced by metro services.