 The DART line is the only electrified railway in the country and over 80,000 people use it every day making it arguably Ireland's greatest public transport success story.The DART system was opened in July 1984 and like all other rail service in Dublin, it suffers from extreme overcrowding at rush hours, but future expansion plans will increase its capacity by 40% to 30,000 passengers by 2035.Iarnród Éireann's plans are also on the pipeline to greatly expand the DART suburban railway network by boring a tunnel through Dublin City Centre allowing the creation of two separate DART lines.