Branches were later built from Gawler to termini in Angaston, Truro, Morgan, Robertstown, Peterborough, Spalding and Gladstone.

[10] The depot is the major maintenance and re-fuelling facility for the diesel train fleet, with capacity to store 70 railcars with over 11 kilometres of track.

The depot has been designed to allow future conversion to support electric rolling stock.

To facilitate work on the Torrens Rail Junction in 2017, the Gawler line between Adelaide and Mawson Lakes was closed from 1–15 October and 18 November to 5 December.

[13] A $220 million grant from the Federal Government allowed for Stage 2 electrification for the remainder of the line to proceed.

As part of the project, a new public park was constructed underneath the overpass, and the adjacent Ovingham railway station was rebuilt.

[24][25] The line runs from Adelaide station north via Prospect, Mawson Lakes, Salisbury, Elizabeth and Smithfield to the town Gawler on the outer northern metropolitan fringe.

Like the rest of the Adelaide suburban passenger rail network, the line is 1,600 mm (5 ft 3 in) broad gauge for its entire length.

Bus Tram All suburban rail passenger services are operated by Adelaide Metro.

[26] Under this policy, the Hi-Frequency stations (Islington, Mawson Lakes, Parafield, Salisbury, Elizabeth, Smithfield, Tambelin and Gawler) have services every 15 minutes from Monday to Friday.

[27] Freight is a major factor along this transport corridor, with the Australian Rail Track Corporation's standard gauge Adelaide to Port Augusta line running parallel to the broad gauge track between Adelaide and Salisbury.