In addition to six new stations, the project involved construction of a new depot at Gwanggyo, the new southern terminus and the only surface station on the extension. All other stations are located underground including Gwanggyo Jungang, which uniquely features a bus stop built into to the first underground floor for easier transfers.

Another intermediate station, Migeum, was added to the project at a later stage and is expected to open in October 2017. This will give the Shinbundang Line an extra interchange with the Bundang Line in addition to Jeongja station, which is only 1.8km away.

The addition of Migeum station was not without controversy and was opposed by the city of Suwon. One of the main attractions of the line for commuters is the limited number of stations, which results in shorter journey times and adding more stations was viewed as detrimental to this. Shinbundang Line trains operate at up to 110km/h on the surface and 90km/h underground, significantly faster than any other metro lines in Seoul.

Also known as the DX Line, the Shinbundang Line is a privately-owned, driverless metro operated by NeoTrans, Korea. The standard-gauge line is equipped with Thales CBTC and services are operated by a fleet of 12-six-car trains supplied by Hyundai Rotem.

The first 17.3km phase of the Shinbundang Line opened in October 2011 with only six stations, connecting the business district of Gangnam in the south of Seoul with the neighbouring satellite city of Seongnam in Gyeonggi province.

While infrastructure on the first part of the line is operated by the DX Line, the new extension and its stations are under the control of another company, Gyeonggi Rail. This means the operator will pay an additional infrastructure fee for access to the extension. To counter the effect of this on passengers, a discount has been put in place for travel across both sections.

A northern extension of the Shinbundang Line is currently in the design phase and will this will cross the Han River into the heart of Seoul. A final alignment for the extension is still yet to be decided, despite already being displayed as a planned route on some maps. A second phase of the southern extension is also planned to open in 2020, extending the line further west across Suwon.

Shinbundang Train 2