Gyeongin Expressway links Seoul and IncheonDec 21, 1968Labels: Gyeongin Expressway, Seoul IncheonGyeongin ExpyBritannica
Gangbyeon Expressway opens along the Han RiverJan 1, 1972Labels: Gangbyeon Expressway, Han RiverGangbyeonbuk roMike Korea
Olympic-daero construction begins for major eventsJan 1, 1982Labels: Olympic-daero, 1988 OlympicsOlympic daeroMike Korea
Seobu Urban Expressway building period beginsJan 1, 1987Labels: Seobu Urban, Seobu GanseondoroSeobu Ganseon
Construction begins on Seoul Ring Expressway first sectionFeb 1, 1988Labels: Seoul Ring, Capital RegionRoute 100
Seoul Ring Expressway opens Pangyo–Toegyewon segmentNov 29, 1991Labels: Seoul Ring, Pangyo ToegyewonRoute 100Gwangam Tunnel
Dongbu Expressway opens, strengthening north–south accessJan 28, 1992Labels: Dongbu Expressway, UijeongbuDongbu Expressway
Seoul Ring Expressway reaches Jayu-ro connectionNov 3, 1997Labels: Seoul Ring, Jayu-roRoute 100Gangbyeonbuk ro
Seoul Ring Expressway expands through eastern Incheon corridorJul 24, 1998Labels: Seoul Ring, Seoun JangsuRoute 100
Major 1999 openings connect multiple ring segmentsNov 26, 1999Labels: Seoul Ring, Jangsu SanbonRoute 100Dev Asia
Ilsan–Jayu-ro link opens, nearing a functional ringSep 11, 2001Labels: Seoul Ring, Ilsan Jayu-roRoute 100Dev Asia