Editing Gyeongui Line (section)

===Upgrade===<!-- [[Korea Train Express#Further upgrades of connecting conventional lines]] links here-->

Meanwhile, work began to upgrade the South Korean section for high-capacity commuter services. Between Seoul and Munsan, the line is converted into an electrified, double-tracked railway in a new, straighter, 48.6&nbsp;km long alignment.<ref name="KRNA_2010">{{cite web |url=http://www.krnetwork.or.kr/service/condition/RouteMapView.do?PA_MAP_ID=12419 |title=용산~문산 복선전철 |publisher=Korea Rail Network Authority |access-date=2010-12-30}}</ref> Work began in November 1999, with a budget originally estimated at 1,970 billion won.<ref name="rgi-korailplans">{{cite web |url=http://www.railwaygazette.com/news/single-view/view/10/south-koreas-growing-network.html |title=South Korea's growing network |date=2008-09-08 |publisher=[[Railway Gazette International]] |archive-url=https://archive.today/20121205072403/http://www.railwaygazette.com/news/single-view/view/10/south-koreas-growing-network.html |archive-date=2012-12-05 |access-date=2010-08-29}}</ref> The section from [[Digital Media City station|Digital Media City]] (DMC) to [[Munsan station|Munsan]] was finished on July 1, 2009.<ref name="KRNA_2010"/> The remaining section will be mostly underground between [[Gajwa Station]] in northwestern Seoul to [[Yongsan Station]] in downtown Seoul.<ref name="KRNA_2010"/> As of 2009, construction progress on the entire Seoul–Munsan section reached 74% of a total budget then estimated at 2,153.271 billion won.<ref name="KRNA_2010"/> The section is to be finished by 2014<ref>{{Cite web | title =[수도권II] 경의선 효창정거장 부지 220m 때문에 | publisher =Chosun | date =August 25, 2011 | url =http://news.chosun.com/site/data/html_dir/2011/08/24/2011082402671.html | language = ko | access-date = 15 July 2012}}</ref> and the freed area on the surface was reconstructed into a park known as the '''Gyeongui Line Forest Park'''.<ref>{{cite web |url=http://news.chosun.com/site/data/html_dir/2009/11/09/2009110900025.html |script-title=ko:폐철로 위에 핀 '녹색문화공원' |language=ko |date=2009-11-09 |publisher=[[The Chosun Ilbo]] |access-date=2010-12-30}}</ref>

The line is to be further upgraded for {{convert|230|kph|mph}}, as part of a government strategic plan to reduce travel times for 95% of Korea to under 2 hours by 2020, which was announced on September 1, 2010.<ref name="plans2020">{{cite web |url=http://joongangdaily.joins.com/article/view.asp?aid=2925474 |title=Bullet trains coming to a town near you by 2020 |date=2010-09-02 |publisher=[[JoongAng Daily]] |access-date=2010-10-27}}</ref>

The [[Gyeongui–Jungang Line]] (Munsan–Imjingang) extension opened on March 28, 2020.{{citation needed|date=April 2025}}