GTX-C main construction scheduled for September 15 after delays following 2023 approval
The GTX-C project’s actual main construction start was delayed after approval of the implementation plan in December 2023 because of issues over reflecting increases in construction costs. A report dated September 14, 2026, subsequently stated that main construction was scheduled to begin on September 15. This means the date is the expected start of main construction after the delay, not that construction began immediately after approval of the implementation plan.
Approximately 86.5-kilometer line connecting Deokjeong, Suwon, and Sangnoksu stations
GTX-C has been described as an approximately 86.5-kilometer line running from Deokjeong Station in Yangju, Gyeonggi Province, through Seoul’s Cheongnyangni, Samseong, and Yangjae, to Suwon Station and Sangnoksu Station. The project has been presented as a revenue-generating private investment project with 14 stations, a total project cost of 4.9272 trillion won, and a construction period of 60 months. Key stations along the route include Deokjeong, Suwon, and Sangnoksu, as well as Cheongnyangni, Samseong, and Yangjae in the middle section.
Opening targeted for 2031—specific date should be distinguished
The opening target has been given as 2031. Gwacheon City materials record the line as scheduled to open in 2031, while a Maeil Business Newspaper report described a target completion date of September 2031. Because the wording and timing differ between the two sources, the currently verified information is a target schedule for 2031, not a confirmed specific opening date.