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It was customary for the Korean Marines who are about to graduate their 2 years of service, to congregate in front of Yi's statue and swear allegiance. This was stopped due to creating immense traffic congestions to the 8 lane street of Sejongno.[citation needed]
In 2009, major sections underwent a renovation period of 15-months, which downsized the 600-meter road from 16-lane to 10-lanes of traffic.[2] The project included sections of the road from the front of Gwanghwamun and strenches south from the three-way intersection, along the front of the Sejong Center for the Performing Arts to the Sejong-ro intersection, where the statue of the AdmiralYi Sun-sin stands. The reduction was to construct the Gwanghwamun Plaza, a public open space in the center to the road.[3][4]
Gwanghwamun Station, which is on Subway Line 5, is located at the southern end of Sejong-daero. Gyeongbokgung Station, which is served by Subway Line 3, has entrances near the northern end of Sejong-daero.