Thornlie line

Thornlie line
Thornlie line at Thornlie station viewed from the Spencer Road bridge, January 2021
Overview
Status	Temporarily closed
Owner	Public Transport Authority
Locale	Perth, Western Australia
Termini	Kenwick (north-east) Thornlie station (south-west)
Stations	1 (branch)
Service
Type	Suburban rail
System	Transperth
Operator(s)	Transperth Train Operations
Depot(s)	Claisebrook railcar depot
Rolling stock	Transperth A-series trains
History
Commenced	Mid-2004
Opened	7 August 2005 (2005-08-07)
Closed	20 November 2023 (2023-11-20)
Reopened	Mid-2025 (planned)
Technical
Line length	2.9 km (1.8 mi) (branch)
Number of tracks	1 (branch)
Character	At-grade
Track gauge	1,067 mm (3 ft 6 in) narrow gauge
Electrification	25 kV 50 Hz AC from overhead catenary
Operating speed	110 km/h (68 mph)
Signalling	Fixed block signalling
Train protection system	Automatic train protection
Route map Legend Perth Underground 0.0 Perth 0.7 McIver Claisebrook depot 1.3 Claisebrook Swan River 3.3 Perth Stadium 4.6 Burswood 6.1 Victoria Park 7.4 Carlisle 8.1 Oats Street 11.3 Queens Park 12.2 Cannington 13.6 Beckenham Armadale line Canning River 17.0 Thornlie Nicholson Road Ranford Road Mandurah line Cockburn Central Mandurah line This diagram: view talk edit

The Thornlie line is a temporarily closed suburban railway line and service in Perth, Western Australia, operated by the Public Transport Authority as part of the Transperth system. The Thornlie line is a branch of the Armadale line which opened on 7 August 2005 and runs for 2.9 kilometres (1.8 mi) parallel to the Kwinana freight railway between the Armadale line at Kenwick and Thornlie station. Thornlie line services continued north of Kenwick along the Armadale line to Perth station, stopping at most stations, in contrast to Armadale line services, which skipped most stations along that section. The Thornlie line has been suspended since 20 November 2023 due to construction work; it is planned to reopen in mid-2025.

The Thornlie line originated from initial plans for the Mandurah line, which was to branch off the Armadale line and run along the Kwinana freight railway. The Mandurah line's planned route changed in 2001, but not before tunnels were built for the line to exit the Armadale line at Kenwick and enter the Kwinana Freeway. It was decided to build the Thornlie line instead as a one-station branch of the Armadale line. The main construction contract was awarded to Barclay Mowlem in 2004 and the Thornlie line opened on 7 August 2005.

Since 2017, there have been plans to extend the Thornlie line by 14.5 kilometres (9.0 mi) to Cockburn Central station on the Mandurah line, known as the Thornlie–Cockburn Link. This project is currently being built as part of Metronet and involves the construction of two new stations. The main construction contract was awarded to a joint venture between CPB Contractors and Downer in December 2019 at a cost of A$716 million. Construction started in 2020 and the extension was expected to be open in 2023. The cost has since increased to $1.352 billion. Since 20 November 2023, the Thornlie line has been temporarily closed to allow for works on the Victoria Park-Canning Level Crossing Removal Project and the Thornlie–Cockburn Link. The line is planned to reopen in mid-2025, upon which the Thornlie–Cockburn Link is expected to open as well.