Luas is Dublin's Light Rail Transit system, also known as the tram network. The Luas network is made up of 2 tram lines, the Luas Red Line 21km long and the Luas Green Line 22km long which interchange in Dublin city centre. The Luas network has 69 stops and a fleet of 73 trams. Luas customers have completed over 430 million passengers since passenger services started in 2004.