- Shortened the 19.6km-long line linking Baeksan Station in Taebaek to Dogye Station in Samcheok,nGangwon-do to 17.7km by constructing South Korea's longest loop-type tunnel (16.24km).
Other project
Location : Bucheon, Korea
Location : Seoul Seongsu to Cheongdam, Korea
Location : Gimpo to Sinnonhyeon, Korea
Location : Chuncheon, Korea
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