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  • “Seobu Expressway to be Transformed into an Underground Tunnel,” Construction to Begin in August 2015 and be Completed by 2020

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  • “Seobu Expressway to be Transformed into an Underground Tunnel,” Construction to Begin in August 2015 and be Completed by 2020

  • Traffic News SMG 4243

    The Seoul Metropolitan Government has finally decided to transform the 10.33-kilometer section of the Seobu Expressway between Seongsandaegyo (Bridge) (Yangpyeong-dong, Yeongdeungpo-gu) and Geumcheon I.C. (Doksan-dong, Guro-gu) into a four-lane underground tunnel.

    Signing an agreement on March 11, 2015, the city government has designated SeoSeoul City Expressway Company as a BTO service provider.

    The underground tunnel will be a 10.33-kilometer, four-lane highway that stretches from the southern part of Seongsan Bridge to Geumcheon I.C., which is connected to Seohaean Expressway. The underground tunnel project aims to improve the highway conditions both inside and outside of downtown Seoul and relieve a chronically congested section of Seobu Expressway, a major arterial road in southwestern Seoul. Construction is slated to begin in August 2015 and is expected to be completed by 2020.

    When the underground tunnel is completed, 50,000 vehicles a day will pass through it, reducing the traffic congestion at ground level. And the Seobu Expressway at ground level will be turned into a regular road, and an eco-friendly area that links with Anyangcheon (Stream) will be created.

    Furthermore, when the expressway at ground level finally becomes a regular road, most of the crossroads, which are currently used as interchanges, will be changed into intersections with traffic lights and crosswalks, providing citizens with convenient access to Anyangcheon Park. As the side roads of Seobu Expressway will become unnecessary, the remaining area will be landscaped to create parks or recreational areas for the community.

    Seoul Mayor Park Won Soon said, “When the underground tunnel is built, vehicles will be diverted to the underground road, easing the traffic jams on the Seobu Expressway while greatly improving the living conditions of southwestern Seoul.”


    • Location:Yangpyeong-dong, Yeongdeungpo-gu (Seongsandaegyo Bridge) ~ Doksan-dong, Guro-gu
      (Geumcheon I.C.)
    • Size: Four-lane highway, 10.33 kilometers (only for small cars)
    • Period:2010 ~ 2020
    • Total Project Costs: KRW 520 billion
    • Method: Build-Transfer-Operate (BTO)

    <Aerial View of the Current and Projected Status of the Areas Surrounding the Seobu Expressway (Draft)>

    Yangpyeong Reservoir, Yeongdeungpo-gu

    Near Woosung Apt., Guro 1-dong

    Gwangmyeongdaegyo (Bridge)