Incheon Subway Line 3

{{Short description|Proposed rapid transit line in Incheon, South Korea}}

The future Line 3 is planned{{cite web|url=http://www.incheonnews.com/news/articleView.html?idxno=83158|title=인천지하철 3호선 건설 추진 |date=2016-02-15|publisher=Incheon News|access-date=2017-01-17|language=ko}} to be a semi-circular subway line of Incheon. With 66.73km of route extension, it was scheduled to win the title of the longest circular line in the world.

When the initial plan was presented, the project was stranded due to lack of economic feasibility, but it is pushing ahead with its pledge to re-promote the project as a new mayor takes office.[https://www.edaily.co.kr/news/read?newsId=03745766632524408&mediaCodeNo=257&OutLnkChk=Y 유정복 “인천3호선 통해 검단·청라·동구·중구 연결”]