Mandurah line

Mandurah line
A Transperth B-series train on the Mandurah line in the median of the Kwinana Freeway in Como
Overview
Other name(s)	Southern suburbs railway (during construction)
Owner	Public Transport Authority
Locale	Perth and Mandurah, Western Australia
Termini	Perth Underground (north) Mandurah (south)
Continues from	Yanchep line
Stations	13
Service
Type	Suburban rail
System	Transperth
Operator(s)	Public Transport Authority
Depot(s)	Mandurah Nowergup
Rolling stock	Transperth B-series trains Transperth C-series trains
Ridership	21,874,779 (year to June 2024)
History
Opened	23 December 2007 (23 December 2007)
Technical
Line length	70.8 km (44.0 mi)
Number of tracks	2
Character	At-grade and underground
Track gauge	1,067 mm (3 ft 6 in) narrow gauge
Electrification	25 kV 50 Hz AC from overhead catenary
Operating speed	130 km/h (81 mph)
Signalling	Fixed block signalling
Train protection system	Automatic train protection
Route map Show interactive map Legend km Yanchep line Perth 0.0 Perth Underground 0.6 Elizabeth Quay Swan River 7.2 Canning Bridge Canning River 11.7 Bull Creek 13.9 Murdoch Thornlie line 20.5 Cockburn Central 23.8 Aubin Grove 32.9 Kwinana 37.1 Wellard 43.2 Rockingham 47.5 Warnbro Karnup (planned) 64.5 Lakelands Mandurah depot 70.8 Mandurah Green shading denotes the Free Transit Zone   Transperth buses connect at all stations This diagram: view talk edit Show route diagram

The Mandurah line, also known as the Southern Suburbs Railway, is a suburban railway line and service in Western Australia, linking Perth's central business district (CBD) with Mandurah to the south. Operated by the Public Transport Authority (PTA) as part of the Transperth system, the Mandurah line is 70.8 kilometres (44.0 mi) long and has thirteen stations. It commences in a tunnel under the CBD as a through service with the Yanchep line, where two stations are. South from there, the line enters the median strip of the Kwinana Freeway, where five of the line's stations are. The line diverges from the freeway for the southernmost six stations in the cities of Kwinana, Rockingham and Mandurah.

Planning for the Mandurah line commenced during the construction of the Yanchep line in the early 1990s. By the late 1990s, the plan was for the Mandurah line to branch off the Armadale line at Beckenham and follow the Kwinana freight railway to reach the Kwinana Freeway. After the election of a Labor government at the 2001 state election, the planned route was changed to go via a tunnel under the CBD instead. Commencing in 2004, the Mandurah line's construction was divided into seven major contracts. The construction of the CBD tunnel was particularly controversial, with that project encountering severe labour strikes and disputes between the contractor and the PTA.

The Mandurah line was designed similarly to the Yanchep line, using widely-spaced stations with bus interchanges and large park-and-rides. Originally planned to open between Perth and Warnbro staiton in 2006 and between Warnbro and Mandurah in 2007, the CBD tunnel opened on 15 October 2007 and the rest of the line opened on 23 December 2007. Two infill stations have opened since: Aubin Grove on 23 April 2017 and Lakelands on 11 June 2023; and two more have been proposed: South Perth and Karnup. In 2025, an extension of the Thornlie line is planned to open, connecting to the Mandurah line at Cockburn Central station via the route originally proposed for the Mandurah line.

B-series and C-series trains are the main rolling stock used on the Mandurah line, with A-series trains formerly commonly used as well. Trains run at a fifteen minute headway, reducing to as low as a five minute headway in peak, with some services terminating at Cockburn Central during peak. The travel time from Perth to Mandurah is 54 minutes. The line has significantly exceeded patronage expectations, reaching a peak of 21,874,779 boardings in the 2023–24 financial year, making it the busiest line in the Transperth system.