science

Sydney Metro Northwest

Sydney Metro Northwest 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 Northwest rather than just read about it. In short: Sydney Metro Northwest was a rapid transit project that constructed the first section of the Metro North West & Bankstown Line through the north-western suburbs of Sydney, New South Wales, Australia. The project included the conversion of the existing Epping to Chatswood rail link to metro standards and connects the suburbs of Rouse Hill and Chatswood via Castle Hill and Epping.

Key takeaways

Sydney Metro Northwest 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 Northwest to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sydney Metro Northwest from memory before moving on to harder problems.

Reference excerpt

Sydney Metro Northwest was a rapid transit project that constructed the first section of the Metro North West & Bankstown Line through the north-western suburbs of Sydney, New South Wales, Australia. The project included the conversion of the existing Epping to Chatswood rail link to metro standards and connects the suburbs of Rouse Hill and Chatswood via Castle Hill and Epping. The project was managed by Transport for NSW. The line is part of the Sydney Metro system. The completed Metro North West line opened on 26 May 2019, and was later extended to Sydenham via the CBD, which opened on 19 August 2024. Prior to June 2015, the project was known as the North West Rail Link (NWRL). Originally, "North West Rail Link" referred to the section between Epping and Rouse Hill. By June 2015, the name had been extended to cover the route of the original NWRL and the existing Epping to Chatswood railway line. In June 2015, it was announced that the entire project would be renamed the Sydney Metro Northwest.

Project history Planning for the original North West Rail Link which later became known as Sydney Metro Northwest was a long and complex affair. The line was announced, cancelled and re-announced several times beginning in the 1990s. There were differing plans as to how the line would integrate into the rest of Sydney's transport system. The following proposals were endorsed at one time or another by the government: Main line rail connecting to the Main Northern line near Beecroft, with trains accessing the city via either Rhodes (using the Main Northern line) or Macquarie Park (using the Epping to Chatswood line). Main line rail connecting directly to the Epping to Chatswood line at Epping, with trains accessing the city via Macquarie Park. Rapid transit line from the north west to the city via the Inner West, dubbed the North West Metro. Rapid transit line connecting to a modified Epping to Chatswood line at Epping. Trains terminate at Chatswood, with an extension to the city proposed for the future. This was the design that was ultimately selected. By May 2015, media releases from Transport for NSW used the name "North West Rail Link" to address the whole section between Rouse Hill and Chatswood and not just the unbuilt part. On 4 June 2015, Premier Mike Baird and Minister for Transport & Infrastructure Andrew Constance announced the rebranding of the Sydney Rapid Transit to the Sydney Metro. In conjunction with the rebranding, the North West Rail Link was renamed Sydney Metro Northwest.

Line operation In December 2011, the State Government suggested that they have not ruled out the possibility of contracting the operation, rolling stock and signalling on the North West Rail Link to private operators as part of a public-private partnership.

We are focused on the longer term rail options. It's got to work as a single network, the whole network, but we are looking at private sector involvement in those as well. And we've got an open mind. In June 2012, it was announced that the line would use single deck "Metro" style trains, rather than the double deck trains more commonly used in Sydney. In May 2013, it was announced that two consortia had been shortlisted to construct the trains and systems, as well as operate the line:

Northwest Rapid Transit consisting of John Holland, Leighton Contractors, MTR Corporation, Plenary Group and UGL Rail TransForm consisting of Bombardier Transportation, John Laing Investments, Macquarie Capital, McConnell Dowell, Serco and SNC-Lavalin Capital On 24 June 2014, the Northwest Rapid Transit consortium was selected as the preferred operator to deliver the North West Rail Link operations contract.

Construction

Commencement of geotechnical work Coffey Geotechnics supported by AECOM were awarded the tender for geotechnical drilling services in August 2011, and drilling began on 7 September 2011. A drilling rig was set up in a park opposite the Castle Towers shopping centre at Castle Hill, where one of the underground stations will be built. At least 150 boreholes with a diameter of up to 15 centimetres (5.9 in) will be drilled up to 75 metres (246 ft) deep along the proposed alignment between Epping and Rouse Hill in order to develop an understanding of the geological profile. The drilling is anticipated to take about 9 weeks to complete. Dirt from the tunnelling process was recycled and distributed across Sydney.

Major construction contracts awarded

There were three major contracts for the construction of the North West Rail Link. In June 2013, the Tunnels and Station Caverns (TSC) contract was awarded to a joint venture involving Thiess and John Holland, and Dragados. In December 2013, the Surface and Viaduct Civils (SVC) construction contract was awarded to a joint venture between Italian firms Impregilo and Salini. The $340 million contract includes a 270-metre (886 ft) cable-stayed bridge over Windsor Road at Rouse Hill. A third and final major contract - Operations and Train Systems (OTS) - to build the stations and rail systems provide the single deck trains, operate the rail link and maintain the system was announced at the end of 2014, awarded to the Northwest Rapid Transit joint venture between John Holland, Leighton Contractors, MTR Corporation, Plenary Group and UGL Rail. Thiess's civil engineering business was transferred to CPB Contractors in 2016.

Conversion of the Epping to Chatswood rail link

The Epping to Chatswood railway line opened in 2009 as a heavy rail line, initially as a shuttle service between Chatswood and Epping. The line was later integrated into the Northern Line. During O'Farrell's time as premier, the government announced that the line was to be closed and converted to rapid transit standards. The Epping to Chatswood rail link closed from 30 September 2018 for around seven months for conversion to rapid transit standards. A temporary bus service known as Station Link operated with over 100 buses to replace the trains until the stations finished upgrading and reopened in May 2019. In addition Sydney Trains introduced new timetables with extra train services on the North Shore Line to and from the Northern and Western lines with the Central to Epping via Strathfield section extended to Hornsby.

Initial station site works in August 2015

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Sydney Metro Northwest

Start with the simplest possible case. Write down what Sydney Metro Northwest 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 Northwest 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 Northwest 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 Northwest

In research: Sydney Metro Northwest 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 Northwest 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 Northwest is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2019 establishments in Australia, Metro North West & Bankstown Line, Railway lines opened in 2019, so understanding it makes those chapters shorter.
In everyday life: Look for Sydney Metro Northwest 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Sydney Metro Northwest” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Sydney Metro Northwest in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sydney Metro Northwest 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 Northwest out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sydney Metro Northwest in simple terms?

Why does Sydney Metro Northwest 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 Northwest?

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 Northwest.