65 km south of Incheon/Seoul we cross Asan bay via the Seohae Grand Bridge. The bridge is 9.4 km long with a 870 m cable-stayed portion. The main span is 470 m long and is 62 m above the water.

The bridge accomodates six traffic lanes between Dangjin in the south to P'yongtaek in the north. After 7 years of construction it was the longest bridge in South Korea when opened to traffic in November 2000.