from the Adelaide Gaol triangle to Salisbury, then turns north west towards Virginia. Line guide Services Commuter All suburban rail passenger services are operated by Adelaide Metro. On 28 April 2008, new timetables were introduced on the Gawler line in an effort to boost efficiency. Shorter secondary services that terminated at Dry Creek and Salisbury were withdrawn, new limited express services were introduced, and a new Hi-Frequency station policy adopted. Nearly all services either start or terminate their journey at Gawler or Gawler Central stations, apart from a morning peak express service that commences its journey at Salisbury. Under this policy, the Hi-Frequency stations (Islington, Mawson Interchange, Parafield, Salisbury, Elizabeth, Smithfield, Tambelin and Gawler) have services every 15 minutes, while all other stations have a 30-minute service. This is in addition to several peak hour express services that stop only at selected Hi-Frequency stations. Weekend services operate with 30-minute frequency, and every second train runs express between Adelaide and Dry Creek using 3000 class railcars. Evening/Night services are hourly and stop at all stations with the exception of North Adelaide. Until April 2008, most services along the line were operated by 3000 class railcars. However, with the introduction of the new timetable, 2000 class railcars became more frequent, especially during peak hour. The 2000 class railcars were retired in August 2015. Freight Freight is still 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. Since 1984, this line has been standard gauge and had no interface with the suburban lines. Bowmans Rail, One Rail Australia, Pacific National, SCT Logistics, and Journey Beyond operate services via the line, with the latter operating The Ghan and Indian Pacific passenger trains along this section. Until 2007, grain trains operated from Roseworthy to Port Adelaide. The last freight service on the Gawler line was the Penrice Stone Train which operated to Penrice until it ceased operating in June 2014. References External links Gawler Central to City - Adelaide Metro website Gallery of track refurbishment work: Adelaide to Mawson Interchange 2010 Johnny's Pages Gallery of track refurbishment work: Mawson Lakes to Gawler 2011 Johnny's Pages Gallery of track refurbishment work: Mawson Lakes to Gawler 2011-2012 Johnny's Pages Gallery of track refurbishment work: Gawler to Gawler Central 2012 Johnny's Pages Gallery of electrification work: