Armadale line

The Armadale line is a partially-closed suburban railway service in Perth, Western Australia, operated by the Public Transport Authority as part of the Transperth system. The Armadale line is 30.4 kilometres (18.9 mi) long, and starts at Perth station, heading south-east of there to serve Perth's south-eastern suburbs, terminating at Armadale station. Since June 2025, the line has been closed from Beckenham Station to Armadale for the Rail Revitalisation Program and Byford extension with services operating between Perth and Cannington, as Beckanham is only being serviced by Thornlie-Cockburn Line services.

The Armadale line originated from suburban services along the South Western Railway in the 1890s. Suburban services were extended over the first half of the 20th century to eventually reach Armadale station. Diesel services commenced in 1954, which allowed for the opening of more stations closer together. Electrification occurred in the early 1990s, and in 2005, the Thornlie line opened as a branch of the Armadale line south of Beckenham. From 20 November 2023, the Armadale line between Victoria Park and Armadale stations shut down for 18 months. The line reopened between Victoria Park and Beckenham in June 2025. The remainder of the line is expected to re-open in late-2025.

Before the shutdown, Armadale line services ran at four trains per hour during the day, rising to seven trains per hour during peak. Armadale line trains typically stopped at all stations between Armadale and Cannington and skipped most stations between Cannington and Perth, with the exception of Oats Street, Claisebrook, and McIver stations. Thornlie line trains instead stopped at all stations between Cannington and Perth. Transperth A-series trains are mainly used. The Armadale and Thornlie lines received 3,878,183 boardings in the 2023–24 financial year. Since June 2025, trains have operated at four trains per hour between Perth and Cannington.