science

Sydney Metro City & Southwest

Sydney Metro City & Southwest is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sydney Metro City & Southwest rather than just read about it. In short: Sydney Metro City & Southwest is a 30-kilometre (19 mi) rapid transit construction project in Sydney, New South Wales, Australia. The project will extend the Metro North West & Bankstown Line from Chatswood on the North Shore, to Bankstown in the city's southwest via the Sydney central business district.

Key takeaways

Sydney Metro City & Southwest belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sydney Metro City & Southwest to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sydney Metro City & Southwest from memory before moving on to harder problems.

Reference excerpt

Sydney Metro City & Southwest is a 30-kilometre (19 mi) rapid transit construction project in Sydney, New South Wales, Australia. The project will extend the Metro North West & Bankstown Line from Chatswood on the North Shore, to Bankstown in the city's southwest via the Sydney central business district. The line is part of the Sydney Metro system. The project consists of two main components. The first is a new 16-kilometre (9.9 mi) twin-tunnel rail crossing under Sydney Harbour and through the city to Sydenham with seven new underground stations in central Sydney, making it Australia's longest tunnel. The second is the conversion of 11 stations on a portion of the existing Bankstown line on the Sydney Trains network for use by autonomous trains. The first phase, Sydney Metro City (between Chatswood and Sydenham), opened on 19 August 2024. The remaining portion of the converted Bankstown line between Sydenham and Bankstown will open in 2026. When complete, the new track will form part of a single 66-km rail line on the Sydney Metro network. Together with planned improvements to the Main Western line, the project is expected to increase capacity on the Sydney rail network by up to 60%, and allow for the movement of over 100,000 extra commuters across the network every hour. The project began construction in 2017. In 2023, the state government confirmed the cost of the project had overrun initial estimates by $9 billion to a total cost of $20.5 billion, due to budget blowouts and station redesigns.

Project history In 2013, a proposal was raised to extend the then-proposed North West Rail Link, by building a metro-style tunnel from just south of Chatswood Station via St Leonards and North Sydney and under the Sydney Harbour towards Central and Redfern, before joining the newly converted metro lines towards Hurstville, Bankstown, Lidcombe and Liverpool. This largely renews a previous proposal known as the CBD Rail Link (see below), except with metro-style trains instead. The Hurstville extension was subsequently dropped. The proposal was officially announced by the New South Wales government on 10 June 2014. The proposal was contingent on funding from privatising at least 49% of the state's power infrastructure, which was secured in June 2015. Preliminary works involving drilling to depths 70 m (230 ft) below Sydney Harbour commenced on 9 April 2015 to find the alignment for the new Sydney Metro tunnels.

Chatswood to Sydenham section Planning approval for the Chatswood to Sydenham section of the project was received in January 2017. In June 2017, a John Holland, CPB Contractors and Ghella joint venture was awarded the contract to build the twin tunnels from Chatswood to Sydenham. Construction began later that year. A contract for a major upgrade of Central station was awarded to Laing O'Rourke in March 2018. The project includes construction of two new underground platforms to serve the metro and a new underground concourse called Central Walk. The new platforms will be built beneath platforms 13–14. Tunnelling commenced in October 2018. Tunnelling was completed in March 2020. In November 2018, a $1.376 billion contract was awarded to an unincorporated joint venture between CPB Contractors and UGL to be known as Systems Connect, which will include the laying of track from Chatswood to Sydenham as well as converting power on the Bankstown line to Metro standards and also the building of further Metro train facilities at Rouse Hill and Marrickville. In mid-2024, it was announced that the Chatswood to Sydenham section would open on 4 August 2024, However, this was postponed to 19 August 2024.

Sydenham to Bankstown section

From Sydenham, the Sydney Metro takes over the existing Bankstown railway line between Sydenham and Bankstown, which will be converted for use by single-deck autonomous trains with platform-edge doors. Bankstown will become an interchange station between M1 North West & Bankstown and T6 Lidcombe & Bankstown services. The conversion and incorporation of this section of track into Sydney Metro has not been without controversy, with a letter written by four former rail executives John Brew, Ron Christie, Bob O'Loughlin and Dick Day casting doubts on the government's claims of improved reliability as well as warning that commuters west of Bankstown face additional interchange for travel towards the City Circle.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Sydney Metro City & Southwest

Start with the simplest possible case. Write down what Sydney Metro City & Southwest claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sydney Metro City & Southwest before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sydney Metro City & Southwest ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sydney Metro City & Southwest

In research: Sydney Metro City & Southwest appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sydney Metro City & Southwest in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sydney Metro City & Southwest is common in secondary-school and first-year university syllabi. It links to neighbouring topics Metro North West & Bankstown Line, Proposed railway lines in Sydney, Railway lines opened in 2024, so understanding it makes those chapters shorter.
In everyday life: Look for Sydney Metro City & Southwest outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sydney Metro City & Southwest in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sydney Metro City & Southwest means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sydney Metro City & Southwest out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sydney Metro City & Southwest in simple terms?

Why does Sydney Metro City & Southwest matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sydney Metro City & Southwest?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sydney Metro City & Southwest.