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
  • Tender issued for Libyan gas project

    17 September 2026

    An invitation to bid has been issued for a contract to conduct environmental assessments for the project to expand the Mellitah oil and gas complex in Libya.

    The bid submission deadline is 2pm today (17 September) Libyan time.

    The scope of the project includes provision of:

    • An environmental baseline study (EBS)
    • An environmental impact assessment (EIA)
    • An environmental management plan (EMP)

    The client is Mellitah Oil & Gas (MOG), which is a joint venture of Italy’s Eni and Libya’s National Oil Corporation (NOC).

    MOG is based in Tripoli and operates both onshore and offshore oil and gas facilities.

    The joint venture owns and operates six major oil and gas fields across the North African country.

    According to the tender documents, the company that is awarded the contract will need to prepare environmental management measures in compliance with:

    • Libyan environmental legislation
    • Ministry of Environment requirements
    • NOC environmental guidelines
    • Applicable international environmental standards and best practices

    The expansion of the Mellitah oil and gas complex is part of a project estimated to be worth $8bn.

    The wider project is known as the Mellitah Complex Expansion & CO2 Management Integrated Development Project.

    It has six main packages:

    • Onshore package
    • Offshore Structure A
    • Offshore Structure E
    • Subsea pipeline package
    • Site preparation work
    • Carbon capture and storage facility

    Security issues and political instability have been a major problem for Libya’s oil and gas sector since the country’s civil war started in 2011.

    Earlier this month, the Mellitah oil and gas complex was forced to shut down temporarily due to a protest over deteriorating public services.

    The existing onshore complex includes housing, processing units, storage facilities and export facilities.

    It also serves as the launch point for the Greenstream pipeline, which delivers Libyan gas directly to Italy.

    The planned expansion of the complex will involve:

    • Construction of a new fourth gas processing train
    • Construction of a third condensate train
    • Construction of a third natural gas liquids fractionation train
    • Construction of a fourth sulphur recovery unit train
    • Installation of a hydrogen sulphide enrichment unit
    • Installation of a sulphur recovery unit
    • Construction of other associated facilities

    The Mellitah complex is located about 100 kilometres west of Tripoli and is a key energy facility in the west of the country.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/19748920/main.png
    Wil Crisp
  • Nakheel awards $218m Dubai Islands buildings deal

    17 September 2026

    Register for MEED’s 14-day trial access 

    Dubai-based developer Nakheel, now part of Dubai Holding, has 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 the local firm Metac General Contracting Company.

    It 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.

    The works are scheduled for completion in late 2028.

    Bay Grove Residences will ultimately comprise 1,154 homes across 15 buildings. Planning is under way for the remaining 617 homes in phases two and four, with further contract awards expected.

    In August last year, Nakheel awarded a AED2.6bn ($708m) contract to Abu Dhabi-based Fibrex Contracting to build the Bay Villas project at Dubai Islands. The contract includes constructing 636 villas.

    In April this year, another AED527m ($143m) contract was awarded to local firm Al-Nasr Contracting Company to construct the primary infrastructure and utilities works on Island B at the development.

    The Dubai Islands development consists of five islands spanning 18.6 square kilometres. It features more than 59 kilometres (km) of waterfront and 20km of beaches, as well as parks, golf courses, promenades and cycling paths.

    The offshore island project gained renewed momentum in 2022, when Nakheel unveiled a new masterplan and rebranded it as Dubai Islands.

    The reclaimed islands were originally part of the Palm Deira project, which was partially completed before being put on hold in 2008.

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

    Nuclear power ambitions gather pace; Kuwait keeps dealmaking alive despite war; Region invests in raising gas processing capacity.

    Distributed to senior decision-makers in the region and around the world, the September 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/19748850/main.jpg
    Yasir Iqbal
  • Aldar and Mubadala acquire Masdar City Square

    17 September 2026

    Abu Dhabi-based sovereign wealth fund Mubadala Investment Company and local developer Aldar have completed the acquisition of Masdar City Square at Masdar City, in a transaction valued at AED918m ($250m).

    The deal was executed through their joint venture established in 2024.

    Masdar City Square comprises more than 47,000 square metres (sq m) of net leasable area across seven office buildings.

    Completed in Q1 2026, the development is 99% occupied. Tenants include Taqa, the Department of Energy, Emirates College and the Mohamed Bin Zayed University of Artificial Intelligence.

    The transaction expands the joint venture’s real estate portfolio in Masdar City, which is now valued at AED4.7bn ($1.3bn).

    Masdar City is one of the region’s leading hubs for clean energy, artificial intelligence, advanced research and sustainable urban development.

    The joint venture acquired The Link project at Masdar City for AED654m ($178m) in April.

    Comprising about 32,000 sq m of net leasable area across five buildings, The Link is fully leased to a portfolio of major tenants, including Abu Dhabi Future Energy Company (Masdar) and the Mohamed Bin Zayed University of Artificial Intelligence.

    The asset includes Grade A, Leed Platinum office space, a net-zero-energy headquarters building, a multi-use hall and residential accommodation, supporting its position as a high-performing, integrated component of Masdar City.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/19748241/main5814.png
    Yasir Iqbal
  • Dubai announces new 80km highway corridor

    16 September 2026

    Dubai has approved the construction of the new fourth corridor, a major highway programme aimed at boosting inter-emirate connectivity, increasing road capacity and easing congestion.

    The corridor will extend 80 kilometres, from Al-Faya Road in Abu Dhabi to Al-Shanouf Road in Sharjah.

    It will include 12 lanes, 72 bridges and 17 tunnels.

    The project is expected to reduce travel times by up to 60% and serve more than 3.1 million people, while providing links to Al-Maktoum International airport and Etihad Rail.

    It will have the capacity to accommodate 24,000 vehicles per hour in each direction.

    The project will be delivered in two phases. The first phase, running from Al-Shanouf Road to Dubai-Al Ain Road, will be delivered at a cost of AED3.5bn ($953m).

    The second phase will stretch from Dubai-Al Ain Road to Al-Faya Road in Abu Dhabi.

    The scheme adds a fourth spine to a network that has long relied on three main corridors: the E11 (Sheikh Zayed Road/Al-Ittihad Road); the E311 (Sheikh Mohamed Bin Zayed Road) and the E611 (Emirates Road), which together carry more than 850,000 vehicles commuting between Dubai and the northern emirates daily.

    That concentration has made the route one of the country’s most congested, with peak-hour bottlenecks a persistent problem for residents. The new corridor is designed to divert a significant share of that traffic onto a higher-capacity route, rather than add pressure to the existing network.

    The project also aligns with the Dubai 2040 Urban Master Plan, which anticipates population growth to 5.8 million by 2040 and calls for the expansion of roads, railways, airports and ports to support that growth and reinforce Dubai’s position as a global trading hub. This is reflected in the corridor’s direct links to Al-Maktoum International airport and Etihad Rail.

    https://image.digitalinsightresearch.in/uploads/NewsArticle/19725878/main.jpeg
    Yasir Iqbal
  • Contractors submit Expo 2030 convention centre interest

    16 September 2026

     

    Register for MEED’s 14-day trial access 

    Expo 2030 Riyadh Company (ERC), responsible for delivering the Expo 2030 Riyadh venue, received contractor interest on 14 September for a contract to design and build a convention centre in the site's Collaboration District.

    Construction is slated to begin in January 2027 and take 29 months. The development will cover a total gross external area of more than 28,000 square metres (sq m). The total programme area will be about 22,000 sq m and the gross floor area will be 17,000 sq m. The maximum height of the building will be 41.5 metres.

    The venue will be laid out across two levels, with a mezzanine, roof terraces and a 4,030 sq m basement, in addition to mechanical, electrical and plumbing and back-of-house spaces.

    Two flexible exhibition halls are planned, covering a combined 7,280 sq m, as well as 3,800 sq m of pre-function space, 650 sq m dedicated to meeting rooms and 2,200 sq m of outdoor exhibition space in the north and south plazas.

    The appointed main contractor will assume responsibility for packages including the early works substructure and the lead design consultant's deliverables, while carrying out the full scope of superstructure, above-ground waterproofing, external facades, masonry, base build and specialised fit-outs for VVIP, VIP and visitor areas.

    Further scope includes delivering comprehensive MEP services; vertical transportation; final infrastructure tie-points; public-realm hard and soft landscaping; testing, commissioning, handover documentation; and management of the defects liability period.

    The expression of interest notice was floated on 13 September.

    The unusually brief expression of interest deadline of just one day underscores a compressed procurement timeline.

    This accelerated tender and evaluation schedule signals that project organisers are operating under time pressure to secure contractors and maintain the tight schedule required ahead of the event's opening.

    ERC expects to award the formal contract by the end of this year and begin construction in January next year.

    The project is due for completion in early 2030, in time for the main event in October of that year.

    Site progress

    Construction activity at the Expo site is accelerating, with Riyadh moving to award its first major vertical contracts and advancing infrastructure works across the programme.

    Earlier this month, MEED exclusively reported that ERC has tendered a contract to deliver the Souq areas within the expo site.

    These areas are divided into five precincts, with a total development area of about 300,000 sq m.

    In September, Saudi Arabia’s Royal Commission for Riyadh City awarded a design-and-build contract for the construction of a new metro station catering to the Expo 2030 site.

    In April, ERC awarded two contracts for the next phase of infrastructure works at the site to local firm Alyamama Company.

    The scope covered the construction of road networks and infrastructure for water, sewage, electricity, telecommunications and electric vehicle (EV) charging.

    These awards followed ERC’s January award of an estimated SR1bn ($267m) contract for initial infrastructure works at the site to local firm Nesma & Partners.

    That scope covered about 50 kilometres of integrated infrastructure networks, including internal roads and essential utilities such as water, sewage, electrical and communications systems and EV charging stations.

    The masterplan covers 6 square kilometres, making it one of the largest sites ever designated for a World Expo event. Situated north of the Saudi capital, the site will be located near the future King Salman International airport and will provide direct access to landmarks within Riyadh.

    The Public Investment Fund, Saudi Arabia’s sovereign wealth vehicle, launched ERC – a wholly owned subsidiary – in June 2025 to build and operate facilities for Expo 2030.

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

    Nuclear power ambitions gather pace; Kuwait keeps dealmaking alive despite war; Region invests in raising gas processing capacity.

    Distributed to senior decision-makers in the region and around the world, the September 2026 edition of MEED Business Review includes:
    To see previous issues of MEED Business Review, please click here
    https://image.digitalinsightresearch.in/uploads/NewsArticle/19716287/main.jpg
    Yasir Iqbal