make the stations safe, "but to prevent system-wide delay and service disruption and to reduce the social cost to all commuters caused by track intrusions." The retrofit was completed in 2012. South Korea Yongdu station of Seoul Subway Line 2 was the first station on the Seoul Subway to feature platform screen doors; the station opened in October 2005. By the end of 2009, many of the 289 stations operated by Seoul Metro had platform doors by Hyundai Elevator. Seoul Metro Lined 1, 2, 3, 4, 5, 6, 7, 8 and 9 were equipped with platform screen doors. However, not all stations operated by Korail have completed installation. All stations in South Korea will have platform screen doors by 2018. As of 2017, 100% of subway stations are equipped with platform screen doors in Daejeon, Gwangju, Busan, Incheon and Daegu. The platform screen doors, installed in Munyang station in Daegu Metro Line 2 by The Korea Transport Institute in 2013, have a unique rope-based platform screen named Rope type Platform Safety Door (RPSD). A door sets of rope blocks separate the platform from the rails. When the train arrives, the rope screen door sets are vertically opened and allow passenger boarding to and from the train. This RPSD was also used in Nokdong station on Gwangju Metro Line 1, but was removed in 2012, and a new full-height platform screen door was installed in 2016 instead. Spain Half platform screens were installed first in Provença FGC station (Barcelona) around 2003. Later doors were tested on Barcelona Metro line 11 before fitting them on all stations for the new lines 9 and 10, which operate driverless. Platform screen doors were also trialed on four stations of line 12 (MetroSur) of the Madrid Metro from November 2009 until January 2010. Platform doors are also found on the Madrid Barajas Airport People Mover at Adolfo Suárez Madrid–Barajas Airport. Sweden Stockholm commuter rail has platform doors on two underground stations opened in July 2017, as part of the Stockholm City Line. The Stockholm Metro will test platform doors at Åkeshov metro station in 2015 & Bagarmossen metro station in 2021, the metro stations including Kungsträdgården metro station-Nacka Kungsträdgården metro station-Hagsätra metro station will have platform screen doors when it is completed between 2026-2030. As there are multiple door layouts in use on the Stockholm Metro (a full length C20 having 21 doors on each