The Adelaide–Port Augusta railway line is the main route for northbound rail traffic out of Adelaide, South Australia.

SCT Logistics' Penfield intermodal terminal is connected to a siding south of the Northern Expressway and the Bolivar crossing loop.

[5] In 1980, the Federal and State Governments entered an agreement to convert the line from Adelaide to standard gauge, albeit altered to meet the Trans-Australian Railway at Crystal Brook.

It runs on the western side of the same corridor as the Gawler railway line from north of Salisbury railway station to the triangle near Adelaide Gaol, and continues on the western side of the metropolitan broad gauge tracks to Adelaide Parklands Terminal.

The new line allowed Australian National to operate The Ghan, Indian Pacific and Trans-Australian through to Adelaide without passengers having to change trains.

[13][14] The new facilities and trackwork commenced construction on the north-east side of the line, south of the Northern Expressway and north of Heaslip Road and RAAF Base Edinburgh, in 2011–2012.

[15]: 62–66 Coonamia "station" – in the past a provisional stopping place[16] but since the early 2010s comprising only a nameboard – is the site of the "0 km" datum point for routes to Port Augusta, Broken Hill and Adelaide.

[17] The location has a crossing loop 1638 m (1791 yds) long on the south side of the double mainline from Crystal Brook.