The Global Race for Mega-Projects: Infrastructure Logic and the Long Game from the Medog Hydropower Station to NEOM

The Era of Mega Projects: Scale Is No Longer the Only Coordinate

In 2026, the world's ten largest infrastructure projects under construction span Asia, Europe, Africa, and North America — from the giant hydropower station at the Great Bend of the Yarlung Tsangpo River in Tibet, to the NEOM new city covering 26,500 square kilometers in northwestern Saudi Arabia, to a railway network crossing six Gulf countries. The budgets of these projects range from $32 billion to over $500 billion, with construction periods generally exceeding ten years, and some even estimated to take half a century.

Simply listing the scale and cost of these projects is no longer enough to grasp their significance. What truly deserves attention is why these mega projects have emerged at this particular moment, how they will reshape regional energy and logistics systems, and what strategic role state capital plays in them.

Pushing the Limits of Energy Infrastructure: The Engineering and Geopolitics of the Medog Hydropower Station

With a planned installed capacity of 60 million kilowatts, the Medog Hydropower Station is the largest hydropower project in human history. It harnesses the enormous drop of the Yarlung Tsangpo River at the eastern end of the Himalayas — a descent of 2,000 meters within 50 kilometers — by driving four tunnels, each 20 kilometers long, through the mountains, achieving an annual power generation of 300 billion kilowatt-hours. This figure is nearly three times that of the Three Gorges Dam, and the engineering difficulty far exceeds it.

From an engineering perspective, this is a challenge to the limits of tunnel boring, high water pressure, and ecological protection under extreme geological conditions. From the perspective of regional energy patterns, it provides stable clean electricity to southwestern China, supporting the carbon neutrality goals of the eastern coastal industrial belt. But viewed through a geopolitical lens, the completion of this hydropower station means China's ability to regulate the upstream flow of the Yarlung Tsangpo–Brahmaputra River reaches an unprecedented level. Downstream, India and Bangladesh together have more than 130 million people who depend on this river's water, and China will in effect hold key control over upstream hydrology. This asymmetric dependence created by infrastructure is becoming a new variable in Asia's water resource competition.

It is worth noting that the Medog Hydropower Station is not an isolated project. Together with the South-to-North Water Diversion Project, it forms the foundational network for China's inter-basin, inter-regional water resource reallocation. The South-to-North Water Diversion has already completed its eastern and central routes, diverting more than 44.8 billion cubic meters of water annually, while the western route is still under advancement. These projects show that China is addressing the long-term challenge of uneven distribution of water resources and energy through ultra-long-cycle, national-level engineering measures.

The City as Infrastructure: The New Capital and Smart City Plans

In Southeast Asia, Indonesia is attempting to build a new capital, Nusantara, from scratch in the rainforests of Borneo. The city is positioned to replace the sinking and overcrowded Jakarta, becoming a green smart city powered by renewable energy and featuring large wildlife protection areas. At present, the core government district is largely complete, including the presidential palace, ministry buildings, and civil servant housing. However, the overall scale has been scaled back since President Prabowo took office, with a permanent population of about 10,000 people. Whether it can accommodate all government functions as originally planned remains uncertain.The significance of the Nusantara project goes beyond the relocation of the capital itself. It reflects the extreme measures a country takes when coastal cities face a survival crisis under the pressure of climate change. Jakarta has been sinking year by year due to groundwater over-extraction and rising sea levels. Indonesia has chosen to build a new city at a cost of over $32 billion, making it one of the most ambitious experiments in global climate adaptation infrastructure.

Similar urban infrastructure thinking is also reflected in several projects in Saudi Arabia. King Abdullah Economic City, north of Jeddah, is planned to cover 173 square kilometers, accommodate 2 million residents, and be equipped with a deep-water port and special industrial zones. In 2025, the project signed infrastructure contracts worth $145.9 million for an automotive industry cluster. Cities no longer exist merely as living spaces; they function as economic development zones, logistics hubs, and tools of industrial policy.

The Gulf Region: Reconfiguring Transport Networks and Industrial Cities

The Gulf Cooperation Council (GCC) railway is one of the largest transnational rail projects in the world, spanning 2,177 kilometers and connecting six member states into a network. The logic behind the railway's construction is that Gulf countries have long relied on road and air transport, lacking efficient rail freight and passenger corridors. High-speed rail will compress the journey from Abu Dhabi to Dubai to less than an hour while providing new corridors for industrial logistics.

Progress on this railway is uneven: Kuwait signed a design contract in 2025, and Saudi Arabia is independently advancing a $7 billion land bridge project linking Riyadh and Jeddah and connecting to the Gulf rail network. Contractors such as China Railway Construction Corporation are deeply involved, showing that Gulf countries continue to rely on Chinese engineering capabilities in the infrastructure sector.

Another project embodying the logic of industrial cities is Jubail II. This industrial city expansion project, covering 6,200 hectares, focuses on petrochemicals, clean hydrogen, carbon capture, and ammonia production, and is planned to become one of the world's largest petrochemical complexes by 2035. Its significance lies not only in its scale but also in Saudi Arabia's transformation strategy to build downstream industrial chains beyond oil exports. The combination of industrial cities, ports, and railways forms the economic-geographic framework of the Gulf region's post-oil era.

Competition Among Mega-Airports and Logistics Hubs

Dubai's Al Maktoum International Airport expansion project aims to become the world's largest airport, with an annual passenger capacity of 255 million, covering 56 square kilometers, with 5 runways and 4 terminals. The project is led by Dubai South and will eventually replace Dubai International Airport as the main hub for Emirates and flydubai. Airports are no longer just transport nodes but core platforms for regional economic diversification—the planned logistics zones, commercial areas, and free trade zones around them make them super-interfaces in the global trade network.Meanwhile, Dubailand, one of the world's largest leisure destinations, covers an area of 278 square kilometers and includes theme parks, hotels, and residential areas. Although progress has been interrupted multiple times due to funding cycles, it has already introduced 3D printing and robotic construction technologies. Together, these projects demonstrate that Gulf cities are making infrastructure investment a core means of attracting capital, talent, and global consumption flows in the post-oil era.

America's High-Speed Rail Paradox and Infrastructure Politics

California High-Speed Rail, the largest public infrastructure project in U.S. history, is planned to extend from San Diego to Sacramento, spanning 800 kilometers. However, the project faces cost overruns and political interference: Phase 1 costs have soared from an initial $33 billion to between $89 billion and $128 billion, more than $5 billion in federal funding has been withdrawn, and the completion date has been postponed to 2033. Currently, only the middle section from Merced to Bakersfield is under construction, with 80 miles of guideway completed.

The plight of California High-Speed Rail reflects the systemic problems developed economies face in infrastructure renewal: lengthy approval cycles, high land costs, and a mismatch between political cycles and engineering cycles. In contrast, megaprojects in China and the Gulf states are often national-level strategic decisions, with highly centralized funding and administrative execution, making construction timelines far more predictable. This institutional divergence is becoming a key variable in global infrastructure competitiveness.

NEOM: From Linear City to Energy and Data Center

Since its announcement, the NEOM project has attracted global attention with its "170-kilometer linear city." In September 2025, Saudi Arabia's Public Investment Fund suspended the main construction of "The Line" after an internal audit, with estimated total costs reaching $8.8 trillion and completion potentially delayed to 2080. By the time of the suspension, only 2.4 kilometers of foundation work had been completed.

But NEOM has not stalled as a result; instead, it has pivoted toward green hydrogen and AI data centers. The $8.3 billion hydrogen project under construction in Oxagon is approximately 80% complete. NEOM has spent about $50 billion in total, covering multiple sub-projects including the coastal tourism island Sindalah. This shift demonstrates that even in capital-rich countries, ultra-large-scale urban utopias face practical constraints, while energy and digital infrastructure have become more actionable investment directions.

The Capital Logic of Megaprojects: State, Cycles, and Long-Termism

Looking across these projects, two commonalities can be identified. First, most megaprojects are financed by states or sovereign wealth funds rather than purely market capital. For example, Medog is led by PowerChina, a central state-owned enterprise; NEOM is controlled by Saudi Arabia's Public Investment Fund; and Nusantara is funded by Indonesia's central government. This allows project decisions to span multi-decade cycles, but it also makes project goals susceptible to shifts in political direction.Second, these projects are all reshaping the regional infrastructure landscape to varying degrees. The GCC railway integrates Gulf logistics, Medog alters the cross-border water resource pattern, and Nusantara sets a precedent for a climate-migration-driven capital relocation. Each project is not merely a domestic construction effort, but has become an external variable that neighboring countries and even global supply chains must respond to.

In the coming decade, global capital and society will feel the ripple effects of these mega-projects with increasing intensity. Regardless of whether they are ultimately completed, they have already changed our definition of infrastructure—evolved from mere public works into a composite vehicle of national strategy, geopolitical competition, and long-term climate adaptation. To understand these projects, one cannot look only at scale and cost, but must also see how they reconfigure the fundamental directions of resource allocation, power, and population flows.