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
  • Taqa raises $750m to finance water projects

    30 July 2026

    Abu Dhabi National Energy Company (Taqa) has issued a $750m five-year blue bond to finance sustainable water and wastewater management projects.

    The company said the transaction is the largest blue bond issuance in the Europe, Middle East and Africa region. It is also the largest blue bond issued by an integrated power and water utility globally.

    Issuing the bond allows Taqa to raise money from investors specifically to support water-related environmental projects. These can include desalination, wastewater treatment, water recycling and reuse, and infrastructure that improves water efficiency.

    It is the first blue bond issued under Taqa’s Green and Blue Finance Framework, and follows another blue financing transaction in the UAE earlier this year.

    On 8 January, Dubai-based Emirates NBD bank announced the completion of a $1bn dual-tranche sustainable bond issuance, comprising a $300m blue tranche with a three-year tenor and a $700m green tranche with a five-year tenor.

    Emirates NBD said at the time that the $300m tranche was the largest blue bond issued in the UAE and GCC. The proceeds are intended to support marine conservation and sustainable water projects, while proceeds from the green tranche will finance green initiatives.

    Taqa launched its original Green Finance Framework in 2023 and updated it in 2026 to include blue financing instruments. The latest issuance takes its total green and blue labelled bond issuances to $2.6bn since 2023.

    The Taqa financing also comes as the company expands and modernises its water infrastructure. Taqa is targeting reverse-osmosis technology for 66% of its desalination capacity by 2030, up from about 40% in 2025.

    In June, Taqa awarded a contract for the construction of a 1-million-cubic-metre emergency lagoon in Abu Dhabi. The project will be developed in two phases.

    Phase one has a capacity of 500,000 cubic metres and is planned to be completed within 18 months of the contract award.

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

    Saudi Arabia builds for the global stage; Rising uncertainty creates fresh set of challenges in the Maghreb; Gulf banks remain robust in the face of geopolitical tensions.

    Distributed to senior decision-makers in the region and around the world, the August 2026 edition of MEED Business Review includes:

    > MARKET FOCUS: Maghreb fortunes diverge
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/17845953/main.jpg
    Mark Dowdall
  • UAE renewables firm secures $375m in financing

    30 July 2026

    Positive Zero, the UAE-based renewable energy firm, has announced the successful closing of a financing facility of up to $375m.

    The long-term financing was arranged by Paris-headquartered Natixis Corporate & Investment Banking (Natixis CIB) and Saudi Arabia-based The Arab Energy Fund.

    Natixis CIB also acted as financial adviser, facility agent, security agent and green loan coordinator for the transaction.

    “The non-recourse financing is the first transaction of its kind in the region for a diversified portfolio of decentralised infrastructure assets, including distributed solar power generation, energy efficiency and clean mobility solutions,” Positive Zero said in a statement.

    “The financing will provide substantial long-term capital to support Positive Zero’s continued expansion in the United Arab Emirates, Saudi Arabia, Bahrain, Oman and Qatar, funding the growth of its distributed infrastructure portfolio, capital expenditure programme and strategic development initiatives,” the Dubai-based firm said.

    The new debt facility secured by Positive Zero builds on US-based BlackRock’s investment of up to $400m in the company in 2023, “further strengthening the company’s capital structure and supporting the next phase of its growth”.

    Positive Zero has the largest distributed solar capacity in the region with more than 500MW in operations and under construction, avoiding more than 450,000 metric tonnes a year of carbon emissions.

    The company has also saved over 100 million kilowatt-hours (kWh) in energy consumption across its client portfolio through its energy-efficiency solutions.

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

    Saudi Arabia builds for the global stage; Rising uncertainty creates fresh set of challenges in the Maghreb; Gulf banks remain robust in the face of geopolitical tensions.

    Distributed to senior decision-makers in the region and around the world, the August 2026 edition of MEED Business Review includes:

    > MARKET FOCUS: Maghreb fortunes diverge
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/17845491/main3835.jpg
    Indrajit Sen
  • US-Saudi consortium to build $5bn refinery outside Strait of Hormuz

    30 July 2026

    Register for MEED’s 14-day trial access 

    A consortium of privately owned US and Saudi companies has announced an investment commitment of $5bn to build an integrated oil refining, storage and export facility outside the volatile Strait of Hormuz shipping lane.

    After three years of evaluating sites across the Gulf, the consortium has shortlisted three GCC locations beyond the Strait of Hormuz. Discussions have advanced over the past two years, with a preferred site expected to be selected by the end of 2026.

    The consortium, Mera Oil, comprises Fort Worth, Texas-based MWG Enterprises; the US-based Patel Family Office; and PWS, an associate company of Saudi Arabia’s AHQ Group.

    Mera Oil said it remains open to alternative proposals that meet its infrastructure, resilience and development requirements.

    The proposed project will feature a 200,000-barrel-a-day refinery, deepwater port connectivity, large-scale crude and refined-product storage, and marine export facilities.

    A pre-feasibility study covering refinery design, logistics, capital requirements and execution planning is at an advanced stage.

    Once a host jurisdiction is confirmed, the project will proceed to detailed site assessments and engineering design, with mechanical completion targeted for end-2029, followed by commissioning and the start of commercial operations.

    The consortium plans to focus on producing high-specification middle distillates, including ultra-low sulphur diesel and jet fuel, for selected international markets.

    The project is expected to occupy about 1,200-1,500 acres of port-connected industrial land and could create up to 3,000 direct jobs, and around 15,000 indirect and induced jobs, during construction and operations.

    Mera Oil is also progressing discussions with feedstock suppliers and expects financing to include sponsor equity, sovereign and institutional investment, project finance, export-credit support and sharia-compliant funding structures.

    “Designed as a route-resilient energy hub, the development aims to strengthen regional manufacturing, logistics, technical expertise and energy security,” Mera Oil said.

    The first phase of the planned investment will “incorporate energy-efficient refining technologies, emissions-control systems, and potential future capabilities including sustainable aviation fuel co-processing and carbon management.”

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

    Saudi Arabia builds for the global stage; Rising uncertainty creates fresh set of challenges in the Maghreb; Gulf banks remain robust in the face of geopolitical tensions.

    Distributed to senior decision-makers in the region and around the world, the August 2026 edition of MEED Business Review includes:

    > MARKET FOCUS: Maghreb fortunes diverge
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/17843946/main.jpg
    Indrajit Sen
  • Local contractor to build nine Bahrain substations

    30 July 2026

     

    Bahrain’s Electricity & Water Authority (EWA) has awarded the local Al-Kooheji Electrical a contract to build nine 66kV substations across the kingdom, according to a source.

    The project is estimated to be worth $110m and is intended to support rising electricity demand from Bahrain’s domestic, commercial and industrial sectors.

    Four local contractors submitted commercial bids for the contract in January. The bidders were:

    • Nass Contracting ($28.4m)
    • Poullaides Construction Company ($31.7m)
    • Mohammed Jalal Contracting ($32.4m)
    • Al-Kooheji Electrical ($34m)

    The substations will be located at South Hidd Industrial, Mondelez, Alba Downstream Park, Muharraq North, Hamala West, Bani Jamra, Hoora, Maqabah East and West Riffa Club.

    The scope includes the construction of the nine substations and control rooms, as well as the installation of transformers, switchgear and feeders connecting the facilities to the grid.

    It also covers communication cabling, monitoring systems, safety and security systems, and associated civil and structural works.

    As MEED understands, the substations are scheduled to be commissioned in stages. Two are planned for 2026, followed by four in 2027 and the remaining three in 2028.

    Serbia’s Energoprojekt Entel was appointed as consultant for the project in April 2025. The consultant’s contract was valued at about $460,000.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/17834380/main.jpg
    Mark Dowdall
  • CB&I’s newly acquired unit wins Abu Dhabi wells contract

    30 July 2026

    US-based Chicago Bridge & Iron (CB&I) has announced that its Asset Solutions business – acquired earlier this year from UK-headquartered contractor Petrofac – has won a hydrocarbon well services contract in Abu Dhabi.

    The contract was awarded by Cosmo E&P Albahriya, a wholly owned UAE-based subsidiary of Japan’s Cosmo Energy Holdings Company (Cosmo).

    Under the well engineering services contract, CB&I Asset Solutions will support drilling, engineering, planning and operational activities for offshore Block 4 in Abu Dhabi.

    Cosmo secured 100% exploration rights for offshore Block 4 – covering 4,865 square kilometres of Gulf waters northwest of Abu Dhabi city – in February 2021.

    The block was offered in Abu Dhabi’s second hydrocarbons block competitive bidding round, launched by Abu Dhabi National Oil Company (Adnoc) in May 2019.

    “The award strengthens Asset Solutions’ position in the Middle East and solidifies new relationships with key regional operators. With shared goals of prioritising safe, stable and environmentally conscious production, CB&I’s UAE-based team will draw on its local and global experience of delivering innovative well engineering solutions,” the Texas-based CB&I said in a statement.

    ALSO READ: Abu Dhabi awards production licences for hydrocarbon blocks

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

    Saudi Arabia builds for the global stage; Rising uncertainty creates fresh set of challenges in the Maghreb; Gulf banks remain robust in the face of geopolitical tensions.

    Distributed to senior decision-makers in the region and around the world, the August 2026 edition of MEED Business Review includes:

    > MARKET FOCUS: Maghreb fortunes diverge
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/17834142/main4710.jpg
    Indrajit Sen