meed-logo

line1 line2 line3
SIGN IN / REGISTER

Traffic drives construction underground

3 April 2025

 

On 14 February, Dubai construction was thrust again onto the global stage when Elon Musk, the world’s richest man, announced plans to explore the development of an underground Dubai Loop transportation system, along the lines of the Las Vegas Convention Centre Loop project in the US.

Dubai has typically made headlines globally by constructing the world’s tallest towers. As the city becomes increasingly congested on the surface, it is taking some of its largest construction projects underground.

With Musk’s backing, the Dubai Loop scheme is the most high-profile tunnelling project launched to date. It involves carving a futuristic transport system underneath Dubai. The initial phase of the project is currently being studied by Dubai’s Roads & Transport Authority (RTA) in partnership with The Boring Company, which is owned by Musk. It will cover 17 kilometres (km) and have 11 stations, with the capacity to transport over 20,000 passengers an hour.

The project highlights the importance of expanding underground infrastructure in the Middle East region. This is mostly necessitated by the pressure that rapidly growing cities have put on existing transport and utility networks, particularly in major urban centres such as Dubai, Riyadh and Doha.

Underground opportunities

Projects that involve tunnelling, such as metro rail systems, underground highways and pedestrian walkways, are deemed key enablers in reducing congestion and optimising land use.

The recently completed metro systems in Riyadh and Doha are examples of how underground rail networks can facilitate efficient urban mobility, and more such schemes are planned. 

Without these subterranean projects, cities risk being stuck in a permanent state of gridlock, with longer commute times and decreased productivity. At the same time, tunnelling allows urban planners to integrate sustainable transport solutions, as well as large-scale utilities networks, without disturbing existing cityscapes, thereby enhancing connectivity and economic growth.

These developments signal a major shift in engineering priorities, with regional governments investing in underground transport, sewerage and metro extensions to accommodate their growing populations and infrastructure needs.

While the tower crane-dotted skylines of urban centres in the GCC attract attention, delivering major projects underground is an equally impressive engineering feat. Tunnelling under busy cities requires advanced excavation techniques, careful planning and coordination to avoid disruptions.

More tunnelling work is expected as Dubai takes another significant step forward in tackling its ongoing traffic problems [with] a new metro link

UAE tunnelling projects

Tunnelling work forms a significant portion of the Dubai Metro Blue Line extension. Awarded in December for AED20.5bn ($5.5bn), the project includes 15.5km of underground track and five subterranean stations. When operational in 2029, the Blue Line will significantly expand Dubai’s metro capacity, linking major residential and commercial hubs.

More tunnelling work is expected as Dubai takes another significant step forward in tackling its ongoing traffic problems by starting the procurement process for its next metro link: the Gold Line.

Although the technical details of the project have yet to be revealed, it is expected that tunnels will form a major component of the scheme given that the new line will run through busy urban areas where there is little space to build overground. 

The Gold Line will start at Al-Ghubaiba in Bur Dubai. It will run parallel to – and alleviate pressure on – the existing Red Line, before heading inland to Business Bay, Meydan, Global Village and residential developments in Dubailand.

As a first step, the RTA has sent a request for proposals to companies for the lead consultancy role on the multibillion-dollar project.

The UAE’s Etihad Rail also began a study of the tunnels required for the high-speed railway line connecting Abu Dhabi and Dubai in January. The survey works are ongoing on the Jaddaf and Dusup tunnels that will serve the high-speed rail link. Initial plans for the project include tunnelling works totalling 31km.

Another major tunnelling project in the UAE is the $22bn Dubai Strategic Sewerage Tunnels scheme. The client, Dubai Municipality, is preparing to tender its first packages, which include deep tunnels that will stretch 42km in Jebel Ali and 16km in Warsan.

The project will be delivered under a public-private partnership model, with international consortiums competing for contracts. Once completed, these tunnels will replace the traditional wastewater network, reducing energy consumption and enhancing long-term sustainability.

Saudi schemes

In Saudi Arabia, Riyadh is preparing to expand its metro network with the addition of a Line 7 and an extension to the existing Line 2.

The total length of Line 7 will be about 65km, of which 47km will be underground. The line will have 19 stations, 14 of which will be underground.

The project involves constructing a metro line linking the Qiddiya entertainment city development, King Abdullah International Gardens, King Salman Park, Misk City and Diriyah Gate. 

In March, the Royal Commission for Riyadh City (RCRC) gave consortiums until 15 June to submit their bids for a design-and-build contract for the construction of Line 7.

The planned Line 2 extension is 8.4km long, of which 7.1km is underground, and three out of its five stations will be built underground. The RCRC is expected to award the construction contract this year.

In January, the kingdom also completed the phased roll-out of the Riyadh Metro network. The current network comprises six lines spanning about 176km, of which 74km is constructed underground.

These numbers indicate that over 42% of the overall network is underground, highlighting the growing importance of tunnels in the kingdom’s plans to improve infrastructure in its most densely populated cities.

Tunnelling works are also a key component of the plans to improve the stormwater drainage system in Jeddah, where the municipality is preparing for the construction of the King Abdullah Road-Falasteen Road tunnel.

The three-year scheme involves constructing 5.3km of tunnels with an internal diameter of 7.2 metres using tunnel boring machines (TBMs) and another 3.4km of tunnels with a diameter of 3.5 metres driven by pipe jacking or TBMs.

At the kingdom’s Neom gigaproject, city planners are looking to find solutions to many of the problems faced in existing cities and, as a result, tunnels and large-scale underground utilities corridors are being built at the beginning of the project. For example, the development’s Delta Junction tunnels will serve as a railway junction connecting the Spine infrastructure corridor with the Neom Connector rail link to the Oxagon industrial zone. 

The project involves 26.5km of tunnelling work that will be split into a north and a south lot. The construction works are expected to begin this year as the client is evaluating the revised proposals submitted by firms in November last year.

Kuwait Metro will feature extensive tunnelling … ensuring minimal disruption to existing roads while integrating with future transport networks

Further tunnel projects

Beyond the Gulf, Egypt has a long history of tunnelling projects, as it has had to deal with crippling congestion and urban overcrowding for decades. In the 1980s, work was completed on two major projects that involved tunnelling: the first phase of the Cairo Metro system and the Greater Cairo wastewater project, which involved the construction of sewage tunnels on the east and west banks of the Nile. 

Today, Cairo’s tunnelling projects include the Cairo Metro Line 4 project. Spanning 42km with 39 stations, it involves over 20km of tunnels.

Meanwhile, in Morocco, national railway operator L’Office National des Chemins de Fer (ONCF) is constructing a tunnel project in Rabat.

In February, ONCF announced a 3.3km tunnel to be constructed under the Bou Regreg river at an estimated cost of MD1.4bn ($140m). The tunnel will connect the Sale and Agdal stations in an effort to alleviate traffic.

Similarly, the long-awaited Kuwait Metro will feature extensive tunnelling to navigate the dense urban fabric of Kuwait City, ensuring minimal disruption to existing roads while integrating with future transport networks. 

Qatar’s expansion of Doha Metro, meanwhile, requires additional underground infrastructure to connect developing areas and support the country’s vision for a comprehensive public transport system. 

Mecca Metro, already serving millions of pilgrims, is also set for further expansion, likely involving significant tunnelling to facilitate smoother access to holy sites while overcoming geographic constraints. 

In Oman, the Muscat Metro project is likewise expected to link key districts while preserving the city’s landscape and avoiding disruptions to arterial roads by introducing underground sections. 

All of these projects show that tunnels will play an important role in the region’s future as it strives to create cities with more efficient and environmentally sustainable transit and utilities systems. 

https://image.digitalinsightresearch.in/uploads/NewsArticle/13561811/main.gif
Yasir Iqbal

Register for MEED's guest program now to access this article.

Click here to register
Exclusive from Meed
Related Articles
  • Adnoc secures Thailand LNG supply deal

    9 October 2026

    Abu Dhabi National Oil Company (Adnoc) has secured a deal with Thailand-based energy and infrastructure company Gulf Group to supply 2 million tonnes a year of liquefied natural gas (LNG), with deliveries starting in 2027.

    The multi-year sale and purchase agreement (SPA), whose exact duration Adnoc did not disclose, builds on an initial LNG supply deal agreed between the two companies last year. The transaction was arranged through Adnoc’s integrated LNG marketing and trading platform, which was established in July within Abu Dhabi Global Market.

    The hub integrates the marketing operations of Adnoc subsidiaries Adnoc Gas and XRG with the trading activities of Adnoc Trading. It targets a combined portfolio of 47 million t/y of marketable LNG by 2035. Adnoc Trading has developed an active third-party trading portfolio over the past four years, operating from commercial offices in Abu Dhabi, Singapore and Geneva.

    ALSO READ: Adnoc signs energy agreements with Japan and South Korea

    Separately, Adnoc has secured offtake commitments covering approximately 90% of the 9.6 million-t/y capacity planned for its low-carbon Ruwais LNG project.

    In July, Adnoc signed a 15-year SPA with Japan’s Inpex Corporation for the supply of up to 1 million t/y from Ruwais. That contract marked Adnoc’s third long-term Ruwais supply agreement with a Japanese buyer, following deals with Osaka Gas and Mitsui & Co in March and April 2025, respectively. Together, the agreements with the three Japanese firms account for 2.4 million t/y – one-quarter of the terminal’s total capacity, which will be delivered across two 4.8 million-t/y liquefaction trains.

    Adnoc has also secured long-term Ruwais LNG supply agreements with Malaysia’s Petronas, Germany’s EnBW Energie Baden-Wurttemberg and SEFE (Securing Energy for Europe), China’s ENN Natural Gas, UK-based Shell and Indian Oil Corporation.

    Currently under construction in Ruwais Industrial City, Abu Dhabi, the facility is scheduled to begin commercial operations in 2028. Its commissioning will more than double Adnoc’s LNG production capacity to approximately 15 million t/y.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/20421415/main4048.jpg
    Indrajit Sen
  • Fibrex wins $217m Abu Dhabi Seamont residences contract

    9 October 2026

    Register for MEED’s 14-day trial access 

    Abu Dhabi-based contractor Fibrex Construction Group has won an AED800m ($217m) contract to build the Seamont Autograph Collection Residences project, located on Al-Reem Island in the UAE capital.

    Abu Dhabi-based real estate developer Royal Development Holding, a subsidiary of Emirates Stallion Group, and local firm Saas Properties awarded the contract.

    The development comprises two 22-storey towers offering 497 residences, ranging from one- to four-bedroom apartments.

    The construction programme is scheduled to run for 27 months, with completion due in December 2028.

    Fibrex will begin mobilisation immediately, following the completion of enabling works this month, which were undertaken by Sharjah-based Swiss Pro Foundations.

    Dubai-based architectural firm Dewan Architects & Engineers is the project consultant.

    The contract marks another major win for the contractor. Last year, Dubai-based developer Nakheel awarded Fibrex a AED2.6bn ($708m) contract to build the Bay Villas project at Dubai Islands.

    That contract includes the construction of 636 villas.

    READ THE OCTOBER 2026 MEED BUSINESS REVIEW – click here to view PDF

    Industry and logistics drive development at Neom; Saudi Arabia’s investment priorities realign amid conflict; MEED’s 2026 power developer ranking.

    Distributed to senior decision-makers in the region and around the world, the October 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/20420509/main.jpg
    Yasir Iqbal
  • Dubai picks contractor for Al-Maktoum airport terminal

    9 October 2026

     

    Dubai Aviation Engineering Projects (DAEP) has selected a contractor for an estimated AED10bn ($2.7bn) substructure package for the West Terminal, as part of the first phase of the $35bn expansion of Al-Maktoum International airport.

    A joint venture of Beijing-headquartered China Civil Engineering Construction Corporation (CCECC) and Abu Dhabi-based Tristar Engineering & Construction will execute the contract.

    According to a description on DAEP’s website, the expanded airport’s West Terminal will be a seven-level facility spanning 800,000 square metres, with annual capacity for 45 million passengers.

    The terminal will be the second of three planned terminals at Al-Maktoum International airport. It will connect to the airside via a 14-station automated people-mover (APM) system.

    In July, MEED exclusively reported that DAEP had awarded an estimated $1.5bn contract to a joint venture of Japan’s Mitsubishi Corporation and Indian contractor Larsen & Toubro for the APM system.

    The APM will run beneath the apron and terminal areas, using multiple tracks to transport passengers between terminals and concourses. Four underground stations are planned in the first phase, while the full airport development is expected to include 14 stations.

    The latest awards form part of a wider programme of contracts recently signed by DAEP, covering enabling works, the second runway, initial structural foundations for passenger terminals and concourse substructures.

    Upcoming awards

    In June 2026, DAEP said it will award construction contracts worth over AED55bn ($15bn) for Al-Maktoum International airport by the end of the year.

    At the time, DAEP said the planned awards included substructure works for the West Terminal, the fourth aircraft concourse and the baggage-handling system. The programme also included superstructure works for the West Terminal and the first, second and third aircraft concourses.

    The packages are expected to include long-span structural frameworks for buildings covering about 1.5 million square metres, infrastructure works for the southern airfield area, and power-generation and district-cooling plants supporting the construction programme.

    DAEP also plans to award façade and roofing packages in 2026.

    The Dubai Government approved updated designs and timelines for its largest construction project in April 2024. In September 2024, MEED exclusively reported that a team comprising Austria’s Coop Himmelb(l)au and Lebanon’s Dar Al-Handasah had been confirmed as lead masterplanning and design consultants for the Al-Maktoum International airport expansion.

    Construction of the airport is planned in three phases. Once complete, the airport will cover 70 square kilometres south of Dubai and include five parallel runways and 430 aircraft gates.

    It will be five times the size of Dubai International airport and is planned to have a passenger-handling capacity of 260 million passengers a year – the largest in the world. For cargo, it is planned to have the capacity to handle 12 million tonnes a year.

    READ THE OCTOBER 2026 MEED BUSINESS REVIEW – click here to view PDF

    Industry and logistics drive development at Neom; Saudi Arabia’s investment priorities realign amid conflict; MEED’s 2026 power developer ranking.

    Distributed to senior decision-makers in the region and around the world, the October 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/20417755/main.jpg
    Yasir Iqbal
  • Nakheel awards Dubai Islands marine works contract

    9 October 2026

    Dubai-based developer Nakheel, part of Dubai Holding Real Estate, has awarded local firm Mar Marine & Building Contracting a contract for marine and beach works on Island B at Dubai Islands.

    The scope includes constructing breakwaters, removing existing rock revetments and forming a new 320-metre beach near the Bay Villas development.

    The contractor will also refurbish existing beach areas and undertake remedial works along approximately 3 kilometres of the island’s western shoreline.

    The works are scheduled for completion in the fourth quarter of 2027.

    The package supports the Bay Villas project, which comprises 636 villas and townhouses on Island B. Nakheel awarded Fibrex Contracting an AED2.6bn ($708m) construction contract for the residential development in August 2025.

    The marine works award follows Nakheel’s AED527m primary infrastructure and utilities contract for Island B, which was awarded to Al-Nasr Contracting Company in April 2026.

    In September, Nakheel awarded a main construction contract worth more than AED800m ($218m) for phases one and three of Bay Grove Residences at Dubai Islands. The contract was awarded to local firm Metac General Contracting Company.

    The contract covers the construction of 537 apartments, comprising one- to four-bedroom units, across seven residential buildings. Phase one includes 296 units in four buildings, while phase three comprises 241 units across three buildings.

    READ THE OCTOBER 2026 MEED BUSINESS REVIEW – click here to view PDF

    Industry and logistics drive development at Neom; Saudi Arabia’s investment priorities realign amid conflict; MEED’s 2026 power developer ranking.

    Distributed to senior decision-makers in the region and around the world, the October 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/20418469/main.jpg
    Yasir Iqbal
  • Iraq refinery project given regional approval

    9 October 2026

    Plans to establish a 70,000-barrel-a-day (b/d) refinery in the Iraqi town of Qayyarah have been approved by the Nineveh Provincial Council, which has called for the project to be referred to Iraq’s Council of Ministers. The council also recommended that Duhok-based Karband Company, an industrial manufacturer of asphalt products and lubricating oils, be involved in the project.

    The council’s vote follows a meeting held in September between Iraq’s Oil Ministry and Angola’s Sonangol on potentially jointly developing the Qayyarah refinery.

    The planned refinery would allow more of the crude produced in Qayyarah to be processed locally, increasing supplies of petroleum products and reducing the need to transport locally produced crude south for export via the Strait of Hormuz.

    Iraq awarded the Qayyarah oil field to Sonangol in its second licensing round in 2009, with an initial target of around 120,000 b/d.

    A new upstream expansion phase began in January 2025, when Sonangol contracted the Iraqi Drilling Company to drill 10 wells, with an option for three additional appraisal wells.

    An existing refinery in Qayyarah, built in 1955, has a capacity of 20,000 b/d.

    Progress on the new facility has stalled in recent years, with little movement since 2021, when Iraq signed a memorandum of understanding with Sweden’s SEAB and Turkiye’s Limak on developing the refinery.

    Previously, Iraq’s Oil Ministry said the project would include modern units and complex refining technology to produce products meeting Euro 5 standards

    The scope of the project is expected to include:

    • Processing units
    • Storage tanks
    • Distillation units
    • Associated facilities

    The project was first announced in 2018 and has encountered several delays due to funding problems.

    READ THE OCTOBER 2026 MEED BUSINESS REVIEW – click here to view PDF

    Industry and logistics drive development at Neom; Saudi Arabia’s investment priorities realign amid conflict; MEED’s 2026 power developer ranking.

    Distributed to senior decision-makers in the region and around the world, the October 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/20413126/main.png
    Wil Crisp