South Western Railway, Western Australia

The '''''' (54 Vict. No. 14), an act by the Parliament of Western Australia granted assent on 26 February 1891, authorised the construction of the railway line from Bayswater to Bunbury. Construction The South Western Railway was constructed for the Western Australian Government Railways (WAGR) by various private contractors from 1891. Among these was the engineer and magistrate Owen. Construction was completed in two parts. The first, East Perth to Pinjarra, was undertaken by William Atkins (former mill manager of the Neil McNeil company at the Jarrahdale Timber Station) and Robert Oswald Law (who built the Fremantle Long Jetty) from the end of 1891. This section opened on 22 May 1893. The second phase of construction was also completed by Atkins and McNeil, starting at Bunbury and working north to Pinjarra opening on 22 August 1893. Post-World War II improvements Prior to 1938, the WAGR determined that the South Western Railway would soon reach saturation point. During World War II, plans for its full duplication between Armadale and Brunswick Junction were therefore included in an intended post-war improvement project. A special committee later recommended, however, that the proposed duplication be replaced with centralized traffic control (CTC), and in 1944 that recommendation was confirmed by the WAGR's newly appointed Signal and Telegraph Engineer, who had gained experience with CTC while working for the New Zealand Railways Department. The first part of that line to be relayed was the Armadale to Picton Junction section, on which work began in 1952 and was completed in 1954. Work on the section between Picton Junction and Bunbury followed in 1960, and then the double track section in Perth's south eastern suburbs equivalent to was relaid in 1961 and 1962. Meanwhile, installation of CTC equipment began with the equipping of a pilot section between Armadale and in 1958. The CTC was then extended progressively southwards, to by April 1959, and then to , including a crossing loop at Venn, by June 1959. Proposals for a extension of the double tracked Perth suburban portion of the line from Armadale as far as Byford, and installation of the CTC all the way to Brunswick Junction, both ended up being abandoned due to a shortage of funds. Even so, the truncated project, when it entered fully into service, was the first large-scale application of CTC in Australia. ==Alignment==

As operated by the WAGR, the line was from Perth to Bunbury. Since that time, the line has been shortened to as some stations have closed, moved or been replaced by passing loops. The first of the line from are served by Transperth's Armadale Line. This section is double-tracked and electrified using 25 kV AC. The line south of Armadale is not electrified and predominantly single-track, with passing loops at various locations. The section from Perth to Mundijong Junction is controlled by the Public Transport Authority, with the remainder of the line controlled by Arc Infrastructure. The section controlled by Arc Infrastructure has been upgraded to accommodate axle loads, featuring concrete sleepers and continuous welded rail. Bridges The Bunbury Bridge near Perth was the most significant engineering structure on the line. It was replaced by the Goongoongup Bridge in 1996. Other notable bridges include: • Jenna Bidi Bridge over the Canning River in Gosnells • Murray River Bridge south of Pinjarra • Harvey River Bridge north of Harvey • Collie River Bridge south of Roelands Branches The line connects with all Transperth commuter rail lines at Perth, with specific branches to the Midland, Airport and Ellenbrook lines at Claisebrook and the Thornlie–Cockburn Line at Kenwick. The Collie branch connects at Brunswick Junction, providing access to Worsley Alumina and Collie. ==Operations==

Passenger The Transperth commuter rail Armadale Line operates a frequent electric passenger service along the railway from Perth to Byford. Beyond Byford, the only passenger service on the line is The Australind. It has been closed since November 2023 due to upgrade works on the Armadale Line section, and is due to resume with new rolling stock on 29 June 2026. Before its temporary closure, it traversed the entire length of the line from Perth to Bunbury twice a day in each direction, taking about 2 hours and 30 minutes each way. Other named trains that previously operated on the line were the Bunbury Belle and The Shopper. Stations There are currently 31 passenger stations on the line, of which 20 are served by Armadale Line services. Beyond the Armadale Line section, all stations meet Disability Discrimination Act standards. The stations at Brunswick Junction and Bunbury provide connections to Transwa coach services. Freight Freight services on the line are operated by Aurizon and are primarily focused on bauxite and alumina mining and refining. Bulk bauxite is carried from Alcoa Pinjarra to Kwinana for export and bulk alumina is transported from Alcoa Wagerup as well as from Worsley Alumina to Bunbury port. Potential exists for the line to carry mineral sands, agricultural produce, lithium ore and containerised freight on the line in the future. ==See also==