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
  • Frontrunner emerges for Saudi sewage treatment project

    13 March 2026

     

    A consortium led by China’s Jiangsu United Water Technology has emerged as the frontrunner for a contract to build and upgrade two sewage treatment plants in Saudi Arabia, according to sources.

    The contract covers the North Western A Cluster Sewage Treatment Plants Package 11 (LTOM11), part of the next phase of National Water Company’s (NWC) long-term operations and maintenance (LTOM) sewage treatment programme.

    The consortium comprising United Water, Prosus Energy (UAE) and Armada Holding (Saudi Arabia) offered “the lowest tariff” for the project, sources told MEED.

    It is understood that Turkey’s Kuzu has made the next-lowest bid.

    The development, estimated to cost about $211m, will have a combined capacity of about 440,000 cubic metres a day (cm/d).

    In February, MEED exclusively reported that six bidders were competing for the contract.

    The other companies that have submitted proposals include:

    • Alkhorayef Water & Power Technologies (Saudi Arabia)
    • Civil Works Company (Saudi Arabia)
    • VA Tech Wabag (India)
    • Aguas de Valencia (Spain)

    LTOM11, also known as the North Western A Cluster, forms part of the second phase of NWC’s rehabilitation of sewage treatment plants programme.

    The scheme is being procured on an engineering, procurement and construction (EPC) basis with a long-term operations component.

    The main contract was tendered last year, with an award initially expected by the end of 2025.

    It is now understood that NWC is preparing to offer the main contract in the second quarter.

    As previously reported, Saudi Arabia’s NWC is also evaluating five bids for package 12 of its long-term operations and maintenance (LTOM12) sewage treatment programme.

    Known as the North Western B Cluster, LTOM12 forms part of the second phase of NWC’s rehabilitation of sewage treatment plants programme.

    In January, the same United Water-led consortium won the main contract for the Northern Cluster Sewage Treatment Plants Package 10 (LTOM10).

    That project includes the rehabilitation and operation of nine sewage treatment plants located across the Hail, Qassim, Al-Jouf and Northern Borders provinces

    NWC is also preparing to tender a contract for the construction of 10 sewage treatment plants as part of package 14 of the programme.

    The final details of the Eastern A Cluster (LTOM14) package are being finalised, with a tender likely to be issued in March or April, sources told MEED.

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

    Riyadh urges private sector to take greater role; Chemical players look to spend rationally; Economic uptick lends confidence to Cairo’s reforms.

    Distributed to senior decision-makers in the region and around the world, the March 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/15968035/main.jpg
    Mark Dowdall
  • Medina tenders Sikkah Al-Hadid PPP project

    13 March 2026

    Saudi entities including Al-Madinah Regional Municipality, in collaboration with the Ministry of Municipalities & Housing and the National Centre for Privatisation & PPP (NCP), have floated a request for proposal (RFP) notice for the development of the Sikkah Al-Hadid project.

    The project will be procured through build-own-operate-transfer contracts with a 50-year duration, using a public-private partnership (PPP) model.

    The deadline for bid submission is 23 June.

    The project will be located to the west of Medina on an 84,657-square-metre (sq m) site. 

    It includes a four-storey medical centre with a capacity of up to 200 beds and a shopping mall offering retail, food and beverage, and other entertainment facilities.

    In January last year, NCP asked firms to express their interest and prequalify for a contract to develop two mixed-use developments in Medina, which included the Sikkah Al-Hadid project and the Dhul Hulaifah project.

    The Dhul Hulaifah project will be built on a 30,112 sq m site located six kilometres from the Prophet’s Mosque. 

    The development will consist of a four-star hotel integrated with retail and healthcare facilities.

    MEED previously reported that Saudi Arabia had announced a P&PPP pipeline comprising 200 projects across 16 sectors.

    This pipeline aims to attract local and international investors and ensure their readiness to participate in the schemes tendered to the market.

    The initiative comes as the kingdom strives to increase the attractiveness of its economy and raise the private sector’s contribution to GDP.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/15968021/main.jpg
    Yasir Iqbal
  • Fuel storage facility attacked in Bahrain

    13 March 2026

    Register for MEED’s 14-day trial access 

    Fuel storage tanks at a facility on Bahrain’s Muharraq Island were targeted in an attack attributed to Iran, according to a statement from Bahrain’s Interior Ministry.

    The ministry put out an alert for people in surrounding neighbourhoods “to remain in their homes, close windows and ventilation openings, as a precautionary measure against possible exposure to smoke”.

    Videos of the incident, which took place on 12 March, showed a large fire emitting black smoke. The fire was later extinguished by teams of firefighters.

    Bahrain’s international airport is also located on Muharraq Island.

    Iran has been firing missiles at a range of targets in nearby countries since it was attacked by the US and Israel on 28 February.

    On 11 March, a similar attack on fuel storage tanks in Oman led to the closure of some terminals at the port of Salalah.

    Footage recorded by vessel crews at the port, which is the largest in the country, showed explosions and a large fire.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/15963333/main.png
    Wil Crisp
  • Bahrain contacts engineering companies over Sitra refinery damage

    13 March 2026

    Register for MEED’s 14-day trial access 

    Bahrain’s national oil and gas company Bapco Energies is in touch with international engineering companies about damage done to the Sitra refinery by Iranian strikes, according to industry sources.

    In a statement on 9 March, Bapco Energies said its decision to issue the force majeure notice followed “the recent attack on its refinery complex”, without providing details.

    Bapco Energies is yet to share full details about the extent of the damage caused to the refinery, sources said.

    One source said: “Bapco has been corresponding with several companies with regard to the damage. It is being careful not to share confidential information, but it has reached out.”

    Prior to Bapco’s 9 March statement, the Sitra refinery was hit by a strike earlier in the day.

    That strike on the Sitra refinery was the second strike on the complex in days.

    Iranian missiles hit the facility on 5 March, resulting in parts of the refinery being engulfed in flames.

    Iran has been firing missiles at a range of targets in nearby countries since it was attacked by the US and Israel on 28 February.

    In November last year, MEED reported that Bapco Energies was in the final stages of ramping up volumes processed by new units that were installed as part of the Bapco Modernisation Programme (BMP).

    The project at the Sitra refinery in Bahrain is estimated to have been worth $7bn and was inaugurated by Bahrain’s King Hamad Bin Isa Al-Khalifa in December 2024.

    At the time, the companies involved in the engineering, procurement and construction (EPC) contract for the project were still working on the site to assist with efforts to increase volumes.

    Bapco Energies awarded the main $4.2bn contract to perform EPC works on the BMP to a consortium led by France’s Technip Energies in February 2018.

    The consortium also included Spain’s Tecnicas Reunidas and South Korea’s Samsung E&A.

    Technip Energies also performed the project’s front-end engineering and design work. US oil and gas producer Chevron acted as a consultant on the BMP, while Australia-based Worley was the project management consultant.

    In March 2024, after a series of setbacks and delays, France’s Total Energies was brought in to support Bapco in “optimising” the project.

    The BMP is central to Bahrain’s Vision 2030 economic development strategy, and Bapco has said that it is crucial to boosting the country’s long-term downstream potential.

    The BMP was originally expected to reach mechanical completion in 2023, with operations set to begin in 2024.

    The core objective of the BMP was to upgrade the Sitra refinery – Bahrain’s only oil refining asset, which is 90 years old.

    One of the key units to be built as part of the BMP was a residual hydrocracking unit (RHCU) powered by technology licensed from US-based Chevron Lummus Global. The BMP team has built a two-train RHCU with a capacity of 65,000 barrels a day.

    The Sitra refinery includes seven crude distillation units (CDUs) and vacuum distillation units (VDUs) as part of the BMP.

    The new 225,000 b/d integrated crude and vacuum unit replaced CDUs 1, 2 and 3 and VDUs 1 and 3, which had served Bapco Energies for over 80 years.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/15963329/main.jpg
    Wil Crisp
  • Italian consultant wins Egypt battery storage contract

    13 March 2026

    Italy-headquartered consultancy Rina has announced its appointment as owner’s engineer for the 1 gigawatt-hour Nefertiti battery energy storage system (bess) project in Egypt.

    The project is being developed by Dubai-based firm Amea Power and is located in the Benban Photovoltaic Industrial Park in Aswan.

    The scheme will deploy a 500MW/1,000 megawatt-hour (MWh) utility-scale bess, making it the largest independent energy storage project in Africa.

    In March, a group comprising China Energy Engineering International Group, Zhejiang Thermal Power Construction and Southwest Electric Power Design & Research Institute was appointed as the main engineering, procurement and construction contractor.

    The $250m project also includes the construction of a 220kV substation, upgrades to an adjacent substation and development of grid network connection infrastructure.

    Under the owner’s engineer scope, Rina will deliver engineering design review, construction monitoring and commissioning support. The company will also undertake performance verification.

    Egypt’s utilities sector had its strongest year in over a decade in 2025, hitting $5bn in contract awards for the first time since 2015. 

    Last July, Amea Power commissioned Egypt’s first-ever utility-scale bess.

    The 300MWh project had previously reached financial close in June.

    The bess project is an extension of Amea Power’s operational 500MW solar photovoltaic plant in Aswan Governorate, which was commissioned in December 2024.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/15954234/main.jpg
    Mark Dowdall