Seoul City to Improve Connection from Jamsil and Cheonho Bridge South IC to Olympic-daero... Completion by November 2025

Additional Entry and Exit Ramps on Olympic-daero, Olympic-daero to Hangaram-ro (Jamsil), New U-turn Underpass (Cheonho)

[Asia Economy Reporter Lim Cheol-young] Seoul City announced on the 16th that it will add entry and exit ramps to the Olympic Expressway at the south end ICs of Jamsil Bridge and Cheonho Bridge, expand the congestion connection sections, and construct an underpass to make the Olympic Expressway more convenient to use.

The improvement project for the connection system at the south end ICs of Jamsil and Cheonho Bridges began in March and is scheduled to be completed by November 2025.

At the south end IC of Jamsil Bridge, to alleviate chronic traffic congestion, an underpass (width=6m, length=300m) will be newly constructed to allow direct access from the Olympic Expressway (Hanam→Gimpo direction) to Hangaram-ro (Sports Complex direction), and additional entry and exit roads to the Olympic Expressway will be added. The total length is 3.33 km, with a total project cost of 44.7 billion KRW.

A separate connecting road (length=826m) will be installed from the main line of the Olympic Expressway (Gimpo direction) to Jamsil Station and the north end of Jamsil Bridge, and a new connecting road (length=463m) will be constructed from the south end of Jamsil Bridge to the main line of the Olympic Expressway.

At the south end IC of Cheonho Bridge, with a total project cost of 36.7 billion KRW, a connecting road to the Olympic Expressway (total length 2.95 km) and an underpass (width=6m, length=194m) will be newly constructed.

A new underpass will be built in front of the existing underpass for the heavy traffic U-turn (Hanam direction) on the Olympic Expressway, and surrounding roads will be expanded to facilitate smooth traffic flow. Additionally, connecting roads (length=345m) from the main line of the Olympic Expressway (Gimpo→Hanam) to the north end of Cheonho Bridge and Hanam direction, and (length=463m) from under Gwangjin Bridge to the main line of the Olympic Expressway (Hanam→Gimpo) will be newly constructed.

Accordingly, the U-turn underpass at the south end IC of Cheonho Bridge in the Hanam direction on the Olympic Expressway, the main line connection from the Olympic Expressway (Hanam direction) to the north end of Cheonho Bridge, and the connection from under Gwangjin Bridge to the main line of the Olympic Expressway (Gimpo direction) will each have one additional underpass or connecting road alongside the existing ones.

Seoul City has established a traffic management plan maintaining the existing number of lanes and safety measures to minimize inconvenience and ensure safe passage for citizens passing through the construction sections.

Kim Jin-pal, Head of the Urban Infrastructure Headquarters of Seoul City, said, “With the improved connection system at the south end intersections of Jamsil and Cheonho Bridges, traffic volume entering and exiting the Olympic Expressway will be dispersed, significantly alleviating chronic traffic congestion. In particular, it is expected that residents of Songpa and Gangdong will find it more convenient to access the Olympic Expressway.”

This content was produced with the assistance of AI translation services.