Since then, the Gimpo Han River Metro project was promoted under the mayor of Kang Kyung-gu, but the plan was canceled and Seoul Subway Line 9 extended to Gimpo but failed after Yoo Young-rok, a Democrat who was at a political crossroads with Kim Dong-sik and Kang Kyung-gu's Grand National Party, was elected.

The opening of the metro has been delayed several times under the current mayor, Yoo Young-rok and Chung ha-yeong, and it has been criticized by citizens.

And this funds came from the wide-area transportation contributions paid to the company by residents of the Hangang New Town.

Travel time from one end to the other is an estimated 30 minutes and transfers are available at Gimpo International Airport station.

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