Phase 0 Route Selection

Rebuilding the inland spine Australia abandoned. The HSRA wants $55–90 billion for 191 km of coastal passenger rail, with 60 % of the route in tunnel and the rest on prime built-up land that cannot be acquired. The North Coast Line is officially the most serious bottleneck on the East Coast rail corridor and has no upgrade path beyond 2028. Australia ran an inland Sydney-to-Brisbane railway from 1889 to 1988 — the Great Northern Railway — before closing it. Phase 0 rebuilds that inland spine as a modern continental electric tri-modal corridor, frees the coastal rail lines for passenger service, and gives the Hunter Valley two routes to Sydney for the first time. This memo sets out the route logic.

1. The Coastal Bottleneck

To understand why Phase 0 runs inland, start with the coastal alternative that everyone assumes is the right answer. The High Speed Rail Authority (HSRA), established under federal legislation in 2022 and progressively scoped through 2024 and 2025, has been studying a coastal high-speed passenger rail alignment from Newcastle through Sydney and onward toward Brisbane. The Authority’s own business case for the Newcastle-to-Sydney section is now public and the numbers do not work.

The HSRA Newcastle-to-Sydney alignment is approximately 191 kilometres. Of those 191 km, approximately 115 km — about 60 % of the entire route — must be in tunnel. The reason is geological and political. The terrain between Newcastle and Sydney is heavily dissected: Hawkesbury sandstone plateaus, deep river valleys, the Hornsby and Kuringgai bushland, the urban fringe of the Northern Suburbs. The land at ground level is either undevelopable national park, undevelopable steep terrain, or fully built-up high-value residential and commercial real estate. High-speed rail at 250–350 km/h cannot accept the gradients, curves, or surface alignments that low-speed rail accepts. The only way through is underground.

Tunneling at high-speed rail standards costs approximately $200–400 million per kilometre, depending on geology, depth, and station infrastructure. Apply that to 115 km of tunneling and the tunnel component alone is $23–46 billion. Add at-grade construction on the remaining 76 km of mostly built-up coastal land, station infrastructure, rolling stock, and contingency, and the HSRA Newcastle-Sydney section reaches the published cost range of $55–90 billion. That is approximately $290–470 million per kilometre — the most expensive infrastructure ever proposed in Australia, for the slowest deliverable result.

The completion timeline for the HSRA Sydney-Newcastle section, on current scoping, is approximately 2042 to Western Sydney Airport. The full Sydney-Brisbane HSR corridor would not be complete before the 2050s. That is not a delivery timeline for a country facing a 2026 fuel security crisis, climate-driven flood disruption to its only freight rail to Perth and Darwin, and a $786 billion tonne-kilometre annual freight task that is overwhelmingly on diesel-fuelled semi-trailers.

2. Why the Coastal Route Cannot Be Upgraded

2.1 The North Coast Line as it stands

Australia has one rail link between Sydney and Brisbane, and only one. Since the closure of the inland Main North Line north of Armidale in 1988, the entire 987-kilometre Sydney-Brisbane rail freight task has run on the combination of the Main North Line (195 km, Sydney Central to Maitland) and the North Coast Line (792 km, Maitland to Brisbane Roma Street). This is the route that carries every interstate freight train, every Sydney-Brisbane passenger service, and every Hunter Valley coal export movement between the Hunter and the rest of the country.

The North Coast Line was built in 1930 specifically because the original inland Main North Line had a break-of-gauge problem at Wallangarra on the Queensland border. It carries approximately 76 freight train movements per week on the longer Maitland-Brisbane section in normal conditions, plus daily XPT passenger services. The line has 150 separate sections of curves — one industry description calls it “like turning through 150 circles along the way” — with freight speeds typically 60–115 km/h depending on the curve. The Border Tunnel between NSW and Queensland is 1,160 metres long and single track. The Cougal Spiral nearby is another single-track bottleneck. The line is, in operational terms, a 1930s freight railway that has been progressively patched but not fundamentally rebuilt.

2.2 The Sydney bottleneck is structurally unfixable

The southern end of the corridor — the Main North Line between Strathfield in Sydney and Broadmeadow in Newcastle — is officially described by Transport for NSW as “the most serious bottleneck on the East Coast rail corridor that connects Melbourne, Sydney and Brisbane”. The official position is unambiguous: “Passenger services take priority, meaning freight trains can be delayed and are subject to a curfew during peak hours.”

The Northern Sydney Freight Corridor (NSFC) program, jointly funded by the Commonwealth and NSW Governments at a cost of $1.05 billion, was completed in June 2016 and was the most serious attempt in a generation to fix the bottleneck. NSFC Stage 1 raised freight train capacity from 29 to 44 trains per day — a 50 % increase. The works included the North Strathfield rail underpass, the Epping-to-Thornleigh third track, two new passing loops at Gosford and Narara, and a holding track at Hexham. The Lower Hunter Freight Corridor is now in long-term planning to separate freight and passenger services in the Fassifern-Newcastle section.

Infrastructure Australia’s own published assessment of NSFC Stage 1 is candid about its limits. The Stage 1 capacity increase, the Authority states, “will accommodate growth in demand for rail freight up until 2028. In the longer term, the Sydney metropolitan rail network will again become a point of bottleneck for the rail freight network, mainly because of priority given to passenger rail services.” A second package of works is in scoping. Lower Hunter Freight Corridor planning has a 10+ year horizon. Neither is a structural solution; both are further amplifications of the same mixed-use corridor that has been failing to scale for thirty years.

The NSFC Scoping Phase Completion Report is even more direct on the alternatives question. Several different alignments to the existing Main North Line were considered during the program. The report’s conclusion: “Similarly to the other options listed above, none of these alternatives was found to be possible.” In the coastal corridor between Sydney and Newcastle, on currently available land, with the existing built environment, there is no engineerable alternative alignment at any reasonable cost. The corridor is full.

2.3 The land has been built over

This is the structural reality the political conversation has not yet absorbed. Twenty, thirty, fifty years ago, the New South Wales government could have acquired and protected continuous rail corridor between Newcastle and Sydney on agricultural and bushland easements at modest cost. It did not. The land between Newcastle and Sydney is now among the most expensive and most contested real estate in Australia. Every kilometre that is not national park or protected bushland is built up with residential, commercial, or industrial use. Every kilometre that the HSRA proposes to acquire is a fight with residents, councils, and landowners. The acquisition timeline alone, on coastal high-value land, would exceed any reasonable delivery schedule for the infrastructure.

The window for cheap continuous coastal rail corridor between Newcastle and Sydney closed in approximately 1985. The same is broadly true of the coastal alignment north of Newcastle through the Hunter, the Mid North Coast, and the Northern Rivers. The land has been built over. The corridor cannot be acquired now at any cost the country is willing to pay. This is not a failure of political will in 2026; it is the accumulated consequence of fifty years of corridor non-preservation.

3. The Lost Great Northern Railway

3.1 The railway that ran for 99 years

Between 1889 and 1988, Australia had an inland Sydney-to-Brisbane railway. It was called the Great Northern Railway. It ran north from Sydney through Newcastle, Maitland, Werris Creek, Tamworth, Armidale, Glen Innes, Tenterfield, and into Queensland at Wallangarra. From its opening in 1889 until the standard-gauge North Coast Line was completed in 1930, the Great Northern was the primary railway link between Sydney and Brisbane. After 1930 it became a secondary line carrying freight to the wheat and wool regions of northern New South Wales, and passenger services continued until 1972 to the QLD border and 1988 to Tenterfield.

In 1988, the newly elected NSW Greiner Government commissioned a review of the State Rail Authority by the consultancy Booz Allen Hamilton. The review recommended closure of unprofitable lines. The Great Northern Line between Tenterfield and Wallangarra was closed on 15 January 1988, when an Australian Railway Historical Society charter operated the last train. The line further north of Glen Innes was formally suspended from operations in October 1989. Passenger services north of Armidale ceased in November 1988.

In December 1991, the Roads and Traffic Authority built a deviation of the New England Highway over the railway line at Bluff Rock south of Tenterfield. The rail corridor was physically severed. Freight services to a fertiliser depot at Dumaresq continued until the mid-2000s, after which the line closed entirely north of Armidale. Today there is wire across the rail corridor at multiple points between Armidale and Dumaresq, a physical block at the 590-kilometre mark just past Dumaresq, and the bridges further north have fallen into disrepair.

3.2 “No government has been prepared to commit funds in 100 years”

The political history of the Great Northern Railway is the political history of inland Australian infrastructure. A constituent of the New England region, writing to the Armidale Express in response to debate over restoring the line, summarised the position with brutal clarity: “No government has been prepared to commit funds to the Great Northern Line in the last 100 years.” The current NSW Minister for Transport confirmed in writing in 2024: “I am advised that there are currently no plans to reintroduce passenger train services on this section of the Great Northern Railway.”

This is the political failure that Phase 0 inherits and addresses. Australia built an inland Sydney-Brisbane railway in the 1880s. It worked for 99 years. We closed it in 1988 and severed it in 1991. Successive Commonwealth and State Governments since then have known that the East Coast freight task needed an inland alternative to the saturated coastal line, and successive Commonwealth and State Governments have not delivered one. The Inland Rail project, announced in 2017 and partially commissioned, was the most recent attempt, and it was cancelled at Narromine on 7 May 2026 with a $45 billion cost blowout and a delivery horizon beyond 2036.

3.3 The MMC Phase 0 spine partially traces the old Great Northern alignment

Look at the Phase 0 northern stations: Muswellbrook, Tamworth, Armidale, Warwick, Toowoomba, Brisbane. Now look at the old Great Northern Railway alignment north of the Hunter: Muswellbrook, Murrurundi, Werris Creek, Tamworth, Armidale, Glen Innes, Tenterfield, Wallangarra. The Phase 0 spine north of Muswellbrook traces the same inland alignment that the Great Northern Railway used for ninety-nine years. The crossing into Queensland is updated — the modern alignment runs Armidale-Warwick-Toowoomba-Brisbane rather than the old Armidale-Tenterfield-Wallangarra route with its break-of-gauge problem — but the underlying corridor logic is the same.

This is not a new proposal. This is rebuilding what Australia operated successfully for a century before abandoning. It is the historical correct answer that successive governments stopped funding, modernised as continental electric tri-modal corridor and integrated with the southern Main South alignment and the central Main Western alignment to form a continuous Melbourne-Brisbane spine.

4. The Middle-of-the-Road Route

4.1 Three possible routes, three different commercial logics

There are essentially three possible alignments for a Melbourne-Sydney-Brisbane rail spine. Each has different commercial and political consequences.

The Phase 0 route is described as “middle-of-the-road” because it sits between the saturated coastal corridor and the failed far-inland Inland Rail proposal. The coastal route is full; the far-inland route was too far from population to be commercially viable and has been cancelled. The middle route gives the inland Central West, the Hunter Valley, the New England Tablelands, and the Darling Downs a continuous spine for the first time, while still connecting to Sydney and the east-coast cities via dedicated spurs.

4.2 What Phase 0 captures that the alternatives cannot

The Phase 0 inland route captures the freight task that the coastal route is failing to handle and the freight task that Inland Rail was attempting to handle. It serves both inland and coastal freight commercial logic, on one alignment. The cancelled Inland Rail and the bottlenecked coastal line both become unnecessary once Phase 0 is operational, except as fall-back capacity and as legacy local services.

5. What Phase 0 Does for the Coastal Lines

5.1 Freight moves inland — passenger comes back to the coast

The critical insight in the route selection argument is that Phase 0 does not compete with the existing coastal lines. It complements them. When Phase 0 carries the bulk of east-coast continental freight on the inland viaduct, the existing North Coast Line and Main North Line are freed up for passenger service. The coastal lines do not get torn up; they get rebalanced to the task they were originally built for and have been losing because of freight competition.

Today, the Main North Line between Strathfield and Broadmeadow carries 44 freight trains per day (after the NSFC Stage 1 upgrade) plus all Sydney-Newcastle Central Coast intercity passenger services, all Hunter Line services to Maitland and Scone, and the Sydney Trains suburban network as far as Berowra. Passenger services are slow because they share track with freight; freight trains are curfewed because they share track with passenger. Both modes suffer.

Move the freight to the Phase 0 inland spine plus the Phase 0-1 Hunter spur, and the existing Main North Line is suddenly a passenger railway with capacity to upgrade properly. The same is true on the North Coast Line further north: with continental freight removed from the line, the existing infrastructure can be re-signalled, curve-eased, and upgraded for passenger service at modern speeds, on the existing alignment, without expensive land acquisition.

This is the move that lets the HSRA’s stated passenger outcome be delivered without HSRA’s impossible coastal high-speed rail. The HSRA wants fast coastal passenger trains. Phase 0 delivers them — not by building a new $90 billion coastal alignment, but by removing freight from the existing coastal alignment and upgrading what is already there. MMC delivers both: continental freight inland, and the passenger service the HSRA promises, on the existing coastal lines once they are freight-free.

5.2 The Hunter gets two routes to Sydney

The Hunter Valley is one of the fastest-growing regions in NSW. Newcastle is the second-largest city in the state and the third-largest port in the country. Hunter Valley wine, Hunter Valley agriculture, Hunter Valley coal, and the rapidly diversifying Hunter Valley industrial base all need rail access to Sydney and to the rest of the country. The HSRA proposal offers the Hunter one route to Sydney — a coastal high-speed rail at indeterminate completion date and indeterminate cost. The HSRA proposal offers the Hunter nothing at all in inland direction or in interstate freight.

The Phase 0 architecture, by contrast, gives the Hunter Valley two routes to Sydney from day one:

• Direct passenger via Phase 0-2: a maglev passenger spur on the MMC-VC single-leg single-deck variant, running ridge route through the Watagans from Newcastle to Sydney. Designed for high-speed passenger service. Newcastle to Sydney in approximately 17–18 minutes direct, 27 minutes with two intermediate stops (per MMC engineering memo 11). This is what fast passenger rail from Newcastle to Sydney actually looks like, on terrain the MMC platform can be built on.
• Freight + passenger via Phase 0-1: the Hunter spur on the full MMC-VB platform, running Newcastle → Maitland → Singleton → Muswellbrook (113 km), connecting at Muswellbrook to the Phase 0 main spine. This route serves Hunter Valley coal freight, Hunter agricultural freight, and Hunter passenger movements that want to access the inland network or continental destinations. From Muswellbrook, passengers and freight can go west to Dubbo, south through the Blue Mountains via Bathurst to WSA, or north on the spine to Tamworth, Armidale, and Brisbane.

Two routes. One spur for direct fast passenger to Sydney; one spur for full freight and continental passenger access. The Hunter Valley gets infrastructure that serves every commercial and personal travel need it has, not just one half-promised passenger service that may never be built.

5.3 Port Macquarie and the Mid North Coast spur (Phase 0-5)

The same logic extends to the Mid North Coast. The Phase 0-5 spur runs from Brisbane south along the coastal corridor to Port Macquarie, serving the cities of the Gold Coast, Coffs Harbour, and Kempsey, and the Northern Rivers and Mid North Coast regions. Whether Phase 0-5 is built as a full multi-modal MMC corridor (freight + passenger + transmission) or as a passenger-only maglev spur depends on the freight demand modelling, but the principle is the same: coastal cities are served by spurs from the inland spine, not by trying to force the spine itself onto coastal land. The Mid North Coast gets fast passenger rail to Brisbane and Sydney for the first time. Port Macquarie becomes a regional hub. Coffs Harbour, Kempsey, and the Northern Rivers gain the rail service they have not had since the Casino-Murwillumbah branch was closed in 2004.

6. The Phase 0 Spine — Stations and Existing Corridors

6.1 The 18-station spine

The Phase 0 spine has eighteen stations between Melbourne and Brisbane, plus four additional stations on the Phase 0-1 Hunter spur. The full station list:

Phase 0-1 Hunter spur additional stations: Newcastle, Maitland, Singleton (with Muswellbrook as the junction point). 113 km total. Phase 0-2 ridge spur additional stations: Newcastle direct to Sydney through 1-2 intermediate Watagans stops, 142 km total.

6.2 Leveraging existing corridors where possible

The Phase 0 spine is genuinely new infrastructure — an elevated multimodal viaduct, not a track upgrade — but it does not run through virgin country. The alignment leverages or parallels existing rail corridors and easements wherever practical.

The Phase 0 spine, properly considered, is built almost entirely on existing corridors. The southern half from Melbourne to Goulburn follows the Main South Line. The Goulburn-WSA section follows the existing Main South / Hume Highway alignment (with some new alignment through the Southern Highlands at modern HSR standard). The WSA-Bathurst section follows the Main Western Line. The Bathurst-Dubbo section follows the Main Western Line. The Dubbo-Muswellbrook section follows the Golden Highway state route, which has been the road-freight Dubbo-Newcastle corridor since 1996 and is currently being upgraded by Transport for NSW. The Muswellbrook-Tamworth-Armidale section follows the operating Main North Line. The Armidale-Glen Innes-Brisbane section follows the abandoned-but-physically-present Great Northern Railway corridor. The Phase 0 spine is not a greenfield project. It is the rebuild of a network of existing road and rail corridors as a modern elevated multi-modal viaduct.

6.3 Air rights, lease structures, and the MMC platform advantage

The MMC platform is, in architectural terms, a continuous elevated bridge running the full length of Phase 0. Pylons stand at 25-metre spacing along the alignment. The deck overhead carries freight rail, passenger maglev, and electrical transmission. The ground beneath the deck remains available for its original use — whether that ground is existing road, existing rail, agricultural land, or grazing country. Where terrain features require longer spans — valleys, watercourses, ridge lines — the standard 25-metre pylon spacing extends to longer-span bridge sections, but the architectural principle stays the same: the platform is bridge, the ground stays as it is, the deck spans whatever needs spanning. This is not elevated rail in places and at-grade rail in others. It is continuous viaduct.

The MMC elevated platform makes a structurally different commercial proposition possible from the one available to ground-level rail. The viaduct uses the air above existing corridors rather than displacing them. Where the alignment runs over the Golden Highway, the road keeps running below the deck. Where the alignment runs over the existing Main North Line or the abandoned Great Northern alignment, the rail corridor (operating or otherwise) stays in place at ground level. Where the alignment runs over private agricultural land, the landholder keeps their title and continues farming under the viaduct — with their land returning ongoing lease income for hosting the pylon footprints.

This changes the land-acquisition conversation fundamentally. The MMC platform does not need continuous strip acquisition of the kind that conventional rail projects require. It needs pylon-footprint sites on a 25-metre spacing pattern, each covering approximately 20–30 square metres of ground. The space between the pylons remains available for the original land use — road, rail, agriculture, grazing, agrivoltaic farming. The land does not need to be purchased; the air rights and the pylon footprints can be acquired through long-term lease arrangements that leave the underlying title with the existing landholders.

This is the structural innovation that makes the Phase 0 route deliverable on timescales conventional rail projects cannot match. Conventional rail requires acquiring continuous strip easement at fee simple, which means buying out hundreds or thousands of landholders along the alignment, often through contested compulsory acquisition. The MMC platform requires acquiring pylon-footprint air rights through commercial leases, which means agreeing terms with the same landholders for an ongoing income stream while they continue to use the land. The political conversation is different. The cost structure is different. The delivery timeline is different.

The Phase 0 spine, considered through this lens, is fundamentally infrastructure built above what is already there — above existing road corridors, above existing rail corridors, above working farms, above grazing country — on a commercial structure that compensates existing landholders for hosting the pylons rather than displacing them. This is what makes the route deliverable. This is also what makes it politically tractable in a way the HSRA coastal high-speed rail proposal can never be.

6.4 Resilience — fires, floods, and landslips don’t reach the deck

The continuous-viaduct architecture delivers a second structural advantage that the political conversation has not yet absorbed: climate-driven disruption events that close ground-level rail do not close elevated viaduct. Fires don’t reach the deck. Floods don’t reach the deck. Landslips don’t reach the deck. The MMC platform, by virtue of its 6–8 metre elevation and precast concrete construction, is structurally resilient to the failure modes that close Australian ground-level rail for weeks and months at a time.

The case study is sitting on the public record this week. The Beni Creek timber rail bridge near Dubbo, on the freight line between Dubbo and Elong Elong that connects the Central West to the Port of Newcastle, was destroyed by a grass fire in December 2025. The bridge burned to the ground. The line was closed to freight movements for approximately five months — ARTC required "months of planning, demolition and reconstruction" to replace the bridge, with the new structure only reopening on 11 May 2026. During the closure, regional producers and freight operators had to reroute via the Main Western line and the truncated Inland Rail corridor at Cootamundra West, Parkes and Narromine — substantially longer journeys at substantially higher cost. A single grass fire took out a single timber bridge and closed a continental freight route for almost half a year.

This is not an isolated incident. The 2019–20 Black Summer bushfires closed the Main Western Line at Mount Victoria-Lithgow for months — an estimated 50 track-kilometres of signalling and overhead electrification infrastructure severely damaged, sandstone walls in the Zig Zag tunnel deformed "out of gauge due to the intense heat", the heritage Zig Zag railway lost buildings and rolling stock. Between late 2021 and early 2023, Australia’s largest freight operator recorded eight interstate corridor shutdowns of a week or more. The North Queensland floods of February 2025 inundated nine bridges on the North Coast Line. The Trans-Australian Railway across the Nullarbor has been cut by floods three times in four years (2022, 2024, and again in early 2026).

The pattern is consistent: ground-level rail in Australia, on conventional alignment with timber or steel bridges, embankments, ballast, sleepers, and ground-level signalling, is being progressively closed by the climate. Each event closes the line for weeks to months. Each event requires substantial repair investment. Each event diverts freight to road or to long-detour rail. The Australasian Railway Association is calling for a National Freight Resilience Plan. The federal government has committed $1 billion+ in 2024 for rail resilience upgrades. This is the right diagnosis, but the response so far is to patch a fundamentally fragile alignment rather than to build a structurally resilient one.

The MMC continuous viaduct is the structurally resilient alternative. Precast concrete pylons do not burn. Precast concrete deck sections do not burn. Overhead electrification on the deck sits 6–8 metres above any grass or bushfire on the ground beneath, well above the heat damage zone of a fire that would destroy a timber bridge or melt a steel one. Floods that wash out ground-level rail run beneath the deck. Landslips that close existing rail through dissected terrain do not affect pylons sited on stable foundation rock. Heat that warps steel rail does not deform the geometry of the elevated guideway. The structural failure modes that close Australian rail for weeks and months at a time are largely absent from the MMC platform by design.

This is not the same as saying the corridor cannot be disrupted. Extreme events — major bushfire emergencies, severe storm events, earthquakes — can affect any infrastructure. The point is that the routine, repeated, accumulating disruption events that close conventional Australian rail multiple times per year do not close continuous elevated viaduct. The Beni Creek bridge fire of December 2025 would have damaged no Phase 0 infrastructure if Phase 0 had been in place. The Trans-Australian Railway flood closures of 2022, 2024, and 2026 would not have occurred on elevated viaduct. The 2019–20 Main Western Line bushfire closure would not have closed the deck above. The country’s freight resilience improves structurally, not incrementally, when the corridor is built above the failure modes rather than on the same ground that fails repeatedly.

6.5 Fuel security — no diesel for freight, no kerosene for domestic flights

There is a second resilience advantage of the MMC platform that is even more structurally important than the physical climate-resilience argument: the MMC corridor is electric from day one, powered by domestically generated renewable electricity, and is therefore not dependent on imported diesel. This is the structural defence against the fuel-supply disruption scenario that is currently the single largest risk to Australia’s national freight system.

Australian rail freight today is overwhelmingly diesel-hauled. Pacific National, Australia’s largest intermodal freight operator with approximately 70 % of long-haul intermodal market share, runs a fleet of around 600 diesel-electric locomotives. Aurizon, the largest rail freight operator by tonnage at approximately 192 million tonnes per year, operates from a predominantly diesel fleet across 5,100 km of track infrastructure with only the 2,100 km Central Queensland Coal Network electrified. The Pilbara iron ore networks (BHP, Rio Tinto, Fortescue, Roy Hill) are diesel-electric. The Tarcoola-to-Darwin line is diesel. The interstate Sydney-Brisbane and Sydney-Melbourne freight operations are diesel. Australian road and rail freight together consume 20 to 25 billion litres of diesel per year — well over half of national diesel consumption. Aurizon’s battery-electric locomotive program, supported by Australian Renewable Energy Agency funding, is currently retrofitting a single 4000-class diesel locomotive as a pilot, with on-track trials only beginning in 2025-26. The conversion of the broader Australian rail freight fleet from diesel to electric or battery-electric haulage is, on current commitment, a multi-decade programme.

Now consider what this means in the context of Memo 3’s diesel sovereignty argument. Australia imports 80–90 % of its refined transport fuel. The national diesel stockholding is 30–37 days. Approximately half of Australia’s diesel imports depend on shipping routes that pass through or originate from refineries linked to the Strait of Hormuz. The Strait was constrained in March 2026, and the disruption rippled through Australian fuel supply within weeks. Wholesale diesel rose 67 % in two months. If a Strait of Hormuz event closes Australian imported diesel supply for a sustained period, the existing Australian rail freight network stops moving — not because the lines are damaged, but because the locomotives have no fuel. Trucks stop too. The entire long-haul freight task that runs daily Australian life depends on diesel arriving on time, every day, from the Middle East via Asian refineries.

The MMC Phase 0 corridor is structurally immune to this scenario. The electric overhead traction power comes from the Australian renewable generation that the MMC transmission deck itself carries — the same continuous-viaduct platform that hosts the freight rail also hosts the electrical transmission that powers it. The 1,000 GW solar resource modelled in MMA Memo 1 sits on Australian soil, in sovereign Australian generation. The corridor draws electricity from that domestic resource. There is no imported diesel in the supply chain for Phase 0 freight movement. There is no Strait of Hormuz, no Singapore refinery cap, no Asian export curb that can stop the trains running.

This is the fundamental national-security argument for the inland route. Australia’s current continental freight network has a single point of failure that sits 12,000 kilometres away — the Strait of Hormuz and the Asian refineries that depend on it. A continental freight network powered by sovereign Australian renewable electricity has no such single point of failure. The fuel supply is in Australia. The generation is in Australia. The transmission is on the corridor itself. The freight keeps moving regardless of what happens in the Persian Gulf, the South China Sea, the Korean refinery export-cap policy, or the global oil market. This is what national infrastructure sovereignty looks like for a country with Australia’s geography and import dependencies.

The same argument applies, even more sharply, to domestic aviation. Australian domestic flights run on imported kerosene jet fuel from refineries with the same Strait of Hormuz exposure as the diesel supply chain. Australian jet fuel imports were assessed in 2025 as approximately 50 % dependent on Middle East oil and additionally on Asian refineries (particularly China and South Korea) that themselves depend on Middle Eastern crude. National jet fuel stocks were reported by the Energy Minister to Parliament in March 2026 as 32 days of cover. When China imposed a fuel export suspension in March 2026, Australia faced the prospect of needing to replace approximately 28 % of its jet fuel imports from other sources, and global jet fuel cargoes on the water dropped from approximately 4,300 kilotons to 2,100 kilotons — halved in weeks. Jet fuel prices have more than doubled globally during 2026. The aviation sector is, on current published analysis, going through the worst supply shock in its history.

Australian domestic aviation, like Australian freight rail, has no immediate substitute fuel. Sustainable aviation fuel (SAF) exists at small pilot scale only — current European mandates require a 2 % blend, and even that depends on imported used cooking oil and animal fats from China and Malaysia. SAF is, in the words of one analysis, “mathematically incapable of scaling” to replace the millions of barrels of kerosene lost to the current crisis. Battery-electric aircraft for commercial passenger service at continental ranges are decades away from operational deployment. Hydrogen aircraft remain in concept stage. For the immediate, medium, and structural future, Australian domestic aviation depends on imported kerosene.

Maglev passenger service on the MMC Phase 0 corridor displaces a large fraction of Australian domestic aviation demand. The corridor connects Melbourne, Bendigo, Albury, Wagga, Goulburn, Canberra (via the Phase 0-7 spur), Western Sydney Airport, Sydney Central (via the Phase 0-3 spur), Newcastle (via the Phase 0-1 and Phase 0-2 spurs), Toowoomba, Brisbane, and the Gold Coast (via the Phase 0-5 spur) at 600 km/h passenger speed. The journey times that maglev delivers — Melbourne-Sydney in approximately 2 hours including stops, Sydney-Brisbane in approximately 2 hours, Sydney-Canberra in under 30 minutes — are competitive with door-to-door air travel on those routes once airport access, security, and boarding time are included. The maglev replaces the flight for the passengers it serves.

This matters enormously for national fuel security. Australian domestic aviation between Melbourne, Sydney, and Brisbane (and the secondary cities of Canberra, Newcastle, Gold Coast, and the Hunter) is the single largest concentrated kerosene demand in the country. Sydney-Melbourne is consistently among the top three busiest air routes in the world by passenger volume. Replacing those flights with maglev does two things at once: it removes the kerosene demand for those specific routes from the imported supply chain, and it frees up the kerosene cover Australia does have for the international and remote-domestic aviation routes where there is no rail alternative. The same 32 days of jet fuel stock, with domestic east-coast aviation displaced by maglev, becomes structurally longer-lasting cover for the routes that still need it.

The argument is the same in shape as the freight diesel argument: domestic transport powered by imported fuel from supply chains with a 12,000-km single point of failure is a structural national security vulnerability. The MMC platform, by carrying continental electric freight and continental maglev passenger service on the same corridor, displaces the imported fuel demand for both modes. The freight runs on Australian renewable electricity. The passengers ride on Australian renewable electricity. The kerosene Australia does import goes where it has to go: international flights and remote-domestic aviation that no rail can serve.

The Australian Strategic Policy Institute, in a May 2026 analysis titled “Battery-electric freight trains would lift Australia’s energy independence”, made the security framing explicit: rail diesel dependency is an energy security vulnerability for Australia, and converting freight rail to electric is a strategic priority alongside its decarbonisation logic. The ASPI analysis envisages battery-electric tenders with 7–14 MWh capacity achieving ranges of several hundred kilometres on key interstate freight corridors, with hubs for battery swap and grid charging. The MMC continuous viaduct is the structural alternative that makes this transition not just possible but inevitable: overhead transmission on the deck powers the locomotives directly, without the operational complexity of battery swap, on a continental network that is electric end-to-end by design. The same logic applies, even more directly, to maglev passenger service. The fuel supply security and the climate decarbonisation arguments converge on the same engineering answer: build the electric corridor — carrying both freight and passenger — powered by Australian renewable generation.

7. The 2028 Decision Point

This section is the political reality the memo cannot avoid. The Northern Sydney Freight Corridor Stage 1 upgrade, completed in 2016, was scoped to accommodate freight growth until 2028. Infrastructure Australia’s own published assessment confirms the limit. In 2028 — within the next federal electoral cycle — the Sydney metropolitan rail network returns to bottleneck. Freight trains again get curfewed. Passenger services again get delayed. The 200,000 heavy vehicle road trips per year that the NSFC was supposed to remove from the Pacific Highway begin to return to road. The 40 million litres per year of diesel that the NSFC was supposed to save begin to be burned again. The 100,000 tonnes per year of CO2 the NSFC was supposed to avoid begin to be emitted.

The choice in front of the Commonwealth Government and the State Governments in 2026, 2027 and 2028 is not whether to address the East Coast rail capacity question. It is how to address it. There are two real options:

• Continue patching the coastal corridor: NSFC Stage 2 at indeterminate cost, Lower Hunter Freight Corridor at $1B+ and 10+ years, eventually some HSRA component at $55–90B per major section. Each step buys five to ten years of capacity. None solves the structural problem. The total programme commits hundreds of billions of dollars over decades for marginal improvement on a fundamentally constrained alignment.
• Build Phase 0: the inland multi-modal spine that captures continental freight, frees the coastal corridor for passenger upgrade, and gives the Hunter and the Central West and the Darling Downs rail service for the first time in two generations. Sovereign Australian engineering. Modular precast manufacturing. Electric from day one. The programme commits hundreds of billions of dollars over decades for the structural rebuild that ends the bottleneck and rebuilds the regional economy.

Either approach is expensive. Only one of them is structural. The 2028 capacity exhaustion is the forcing event that turns the political question from optional to mandatory. This is the electoral cycle in which the decision is made, by act or by default.

8. Honest Caveats

This memo argues strongly for the Phase 0 inland route. It is also honest about what it does not pretend.

8.1 Land acquisition is replaced, not eliminated

The Phase 0 inland route requires substantially less land acquisition than any conventional rail or coastal HSR alternative, but the land conversation does not disappear. The MMC air-rights model (Section 6.3) requires negotiating pylon-footprint leases and air-rights agreements with landholders along the corridor. Where the alignment runs above existing public infrastructure (road and rail corridors), the negotiation is with the state agencies that hold those easements (Transport for NSW, Australian Rail Track Corporation, Transport Asset Holding Entity). Where the alignment runs above private land (predominantly the agricultural and grazing country away from the road and rail alignments), the negotiation is with individual landholders — but for ongoing lease income on a small physical footprint rather than for outright purchase of strip easement. The conversations are real and substantive. They are tractable in a way the coastal land negotiations are not. Agricultural lease negotiation with a single landholder for a pylon footprint is a different commercial conversation than urban infill acquisition through a dense residential neighbourhood. The Phase 0 route is easier, not free.

8.2 Indigenous and environmental engagement

The Phase 0 spine crosses traditional country of many First Nations communities — Wiradjuri, Kamilaroi, Anaiwan, Bundjalung, Gamilaraay, and others — whose land rights, cultural heritage, and ongoing relationship with country are substantive considerations in any infrastructure of this scale. The Sovereign Build Corporation consortium structure (set out in the SBC Consortium Prospectus) is designed to integrate First Nations engagement and benefit-sharing as a core component rather than a compliance line item. Environmental considerations — watercourse crossings, biodiversity corridors, the Greater Blue Mountains World Heritage Area, Hunter Valley wine country, the New England National Park, the Darling Downs agricultural reserves — are similarly substantive. None of these constraints, on examination, defeats the underlying logic of the inland route. They are the work of delivery, and they have to be done seriously.

8.3 The WSA-Dubbo section is the engineering challenge

The hardest engineering on the entire Phase 0 spine is the section between Western Sydney Airport and Dubbo. This is where the inland route crosses the Great Dividing Range, the existing rail corridor is single-track in places, and the heritage and environmental constraints are most substantive. It is also the section where the MMC elevated platform architecture delivers its largest engineering advantage over conventional ground-level rail. The Phase 0 platform is a continuous elevated viaduct — effectively a bridge running the full length of the spine — with longer-span sections crossing terrain features. The 1-in-30 grades that constrain the 1860s ground-level alignment do not apply to the elevated deck. The dissected valleys are bridged, not climbed.

The section breaks into three distinct engineering segments:

WSA → Lithgow (~145 km) — the Blue Mountains crossing. The existing Main Western Line crosses the Blue Mountains on an 1860s alignment that required gradients of 1 in 30–33 at Lapstone (the original zig-zags) and the Ten Tunnels Deviation built in 1910 to bypass the western zig-zag. The Indian Pacific was diverted off this section in the 1990s because of grade and capacity. The line has been cut by landslip multiple times in recent years — including the July 2022 closure between Blackheath and Mount Victoria where a 60-metre-deep landslip required 40,000 tonnes of gabion rock for repair and the line was closed for nearly four weeks. The MMC viaduct architecture handles this terrain through long-span bridge sections crossing the dissected sandstone valleys, with pylons sited on stable rock outcrops between. The Greater Blue Mountains World Heritage Area engagement is substantive, and the alignment work will require careful environmental and heritage assessment. Engineering judgement is that the crossing is deliverable as elevated viaduct. The work to prove it deliverable is part of Phase 0 detailed design.

Lithgow → Bathurst (~65 km) — the western foothills. The terrain transitions from dissected sandstone to Central West plains. The existing Main Western Line becomes single-track at Wallerawang. The MMC viaduct continues above the existing corridor, with shorter spans on the easier terrain. This is the moderate-difficulty segment between the Blue Mountains test piece and the Central West plains.

Bathurst → Orange → Wellington → Dubbo (~280 km) — the Central West plains. The existing Main Western Line through this section is single-track, operating under the Train Order radio signalling system (essentially 1880s manual signalling with radio overlay), with different loading gauges along its length that mean not all trains can traverse the entire line. It carries approximately 8.84 million tonnes of freight per year, forecast to grow to 11.5 million tonnes by 2056, and is already at capacity for the existing freight task. Six 1-in-40 grades between Orange and Wellington challenge the existing diesel-hauled freight operation. The MMC elevated viaduct above this corridor solves all of these constraints at once: the deck is dual-track (or quad-track on the MMC-VB+ variant), the grades that constrain ground-level rail do not apply to the elevated geometry, and the existing single-track line continues operating at ground level for legacy services while the viaduct above carries the modern multi-modal task. This is the easiest segment of the WSA-Dubbo route to build — flat-to-undulating terrain, established rail easement, willing landholders along an existing rail corridor.

The headline framing is this: Phase 0 has one engineering test piece — the Blue Mountains crossing. Everything else on the WSA-Dubbo section, and on the rest of the 2,300 km spine, is comparatively straightforward construction above existing road and rail corridors. Get the Blue Mountains right and the rest follows. The MMC continuous-viaduct architecture is what makes this possible. Conventional rail is constrained by ground-level grade and curve geometry; elevated viaduct on 25-metre pylon spacing is constrained by foundation siting and span length, both of which are routine bridge engineering problems at this scale.

8.4 The Toowoomba-Brisbane ridge is the second engineering challenge

The second substantial engineering challenge on the Phase 0 spine is the descent from Toowoomba (elevation approximately 662 metres) to Brisbane at sea level over roughly 130 km. The existing 1867 rail line crosses this section using a 2.0 % gradient with tight curves; the main 470-metre climb is from Helidon to Harlaxton on the Toowoomba Range escarpment. The Toowoomba Second Range Crossing road project, completed 2019 at a cost of approximately $1.6 billion for 41 km of new highway through the same range, indicates the scale of the engineering work for any new continental-grade infrastructure across this terrain.

The MMC engineering response is the same architectural principle applied to a different terrain. A continuous elevated viaduct across the ridge, with long-span bridge sections crossing the dissected valleys. The deck handles the elevation transition on its own geometric scale rather than following the ground contours. Pylons sit on stable ridge tops and valley sides. The existing rail line and the Warrego Highway both continue operating beneath, with the MMC deck above.

This is also the section where the MMC platform’s architectural character does substantial work in the public conversation. A continuous viaduct crossing the Toowoomba Range and descending into the Lockyer Valley would be visible from many vantage points and would become a landmark infrastructure feature for Queensland. Built well, it would be beautiful — a piece of modern continental infrastructure with the scale and presence of the Sydney Harbour Bridge or the Storey Bridge. Infrastructure that people travel to see, photograph, and identify with. The engineering choice (continuous elevated viaduct) and the political/aesthetic choice (visible landmark infrastructure) align here.

8.5 The Golden Highway alignment (Dubbo-Muswellbrook)

The 313 km Dubbo-to-Muswellbrook section of Phase 0 follows the alignment of the Golden Highway, the state route gazetted in 1996 that is already the primary road-freight corridor between Dubbo and the Port of Newcastle. Transport for NSW is currently investing approximately $133 million in progressive upgrades to the Golden Highway, identifying it as “an important connection between the central west and the Port of Newcastle” and as one of regional NSW’s main east-west corridors. The Golden Highway carries road freight that explicitly avoids the Blue Mountains crossing to Sydney — the same Dubbo-Newcastle direct freight route logic Phase 0 implements at rail scale.

The MMC viaduct above the Golden Highway converts the existing road corridor into a multi-modal corridor: road continues at ground level, viaduct carries freight rail and passenger maglev above, transmission runs at the upper deck. The existing road easement — already cleared, already publicly held by Transport for NSW, already in active freight use — becomes the natural alignment. The landholders along the Golden Highway corridor (predominantly agricultural and grazing) are largely the same landholders TfNSW already engages with for road upgrades, with established consultation processes and easement frameworks. This section is genuinely easier to deliver than any conventional rail project of comparable length.

8.6 Sydney freight access via WSA

Phase 0 terminates the inland spine at Western Sydney Airport (WSA). This is not just an airport connection. WSA is the access point that brings Sydney metropolitan freight onto the continental inland network. Western Sydney’s freight task is forecast to grow from approximately 18.5 million tonnes (2014) to 41 million tonnes by 2041. The Western Sydney Freight Line and Intermodal Terminal are already designated future corridors by Transport for NSW and Infrastructure Australia, with corridor protection in place since 2016 and the western end of the corridor finalised in June 2020.

With Phase 0 terminating at WSA, Sydney’s freight gets a direct continental connection: north through the inland spine to Dubbo, the Hunter, the New England Tablelands, and Brisbane; south through Goulburn to Canberra, Albury, and Melbourne. Sydney becomes a node on the inland network rather than the bottleneck of the coastal network. The freight that currently moves on saturated coastal rail or the Pacific Highway gets an inland alternative that is faster, electrified, and uncurfewed. The 41-million-tonne-per-year Western Sydney freight forecast is exactly the freight task the inland network is designed to handle.

The intersection point matters politically as well as commercially. Sydney is the largest city in Australia and the largest single freight origin and destination on the East Coast. A continental network that does not intersect with Sydney is not a continental network for Australia. Phase 0’s WSA terminus solves this by intersecting with Sydney at the most accessible point for inland freight movement (Western Sydney), with the existing Sydney Metro Western Sydney Airport line (opening 2026) providing the passenger interface and the planned Western Sydney Freight Line providing the freight interface from WSA to Port Botany and the rest of Sydney’s freight network.

8.7 This memo is not the final engineering document

This memo sets out the strategic and political case for the Phase 0 inland route. The detailed engineering, alignment surveying, environmental impact assessment, Indigenous land council engagement, and economic modelling are pre-feasibility work that the Sovereign Build Corporation consortium and its engineering, environmental, and First Nations partners will progressively deliver. This memo is a public-facing summary of the route logic, not a finished engineering case. The companion MMC engineering memos at multimodalcorridors.com provide the technical detail at platform level.

9. Where to Next

• Read MMA Memo 2 — After Inland Rail: The East-Coast Plan That Exists. The Phase 0 plan in response to Inland Rail’s cancellation, including all spurs.
• Read MMA Memo 3 — The Continental National Plan. What Phase 0 unlocks beyond the East Coast: the six Sovereign Build Corridors, every Australian port and airport on one network, elevated and flood-proof.
• Read MMA Memo 1 — Solar Sizing for the SBC. The 1,000 GW solar resource that powers the continental electric freight that Phase 0 inaugurates.
• Read MMC engineering memos at multimodalcorridors.com for the platform-level technical detail.
• Engage politically. The 2028 capacity exhaustion is the forcing event. The decision to build Phase 0 or to continue patching the coastal corridor is made by act or by default within this electoral cycle.
• Engage with the Hunter, the Central West, the Northern Tablelands, and the Darling Downs. These are the regions that Phase 0 serves. They are the regions whose political voice carries the route forward, or whose political voice loses the route to coastal-dominated infrastructure conversations.
• Engage with First Nations communities whose country the corridor crosses. The Phase 0 route can be delivered as partnership infrastructure, with substantive benefit-sharing and cultural integration, or it cannot be delivered. The choice is part of the delivery.
• Engage with the existing freight industry. Pacific National, SCT Logistics, Aurizon, and the rest of the freight rail and trucking industry have direct commercial interests in seeing Phase 0 delivered. The SBC consortium structure is designed to enable their participation.