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.
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Iraq’s projects market is at an inflection point. The country has built a sizeable and increasingly diverse projects pipeline, backed by ambitious national plans and an improving reform narrative. But according to MEED’s newly updated Iraq Projects Market report, the near-term outlook is now being tested by renewed regional volatility and persistent structural constraints at home.
Iraq is the Middle East and North Africa’s fifth-largest economy by nominal GDP, yet it remains heavily exposed to the hydrocarbons cycle. Oil and gas generate about 90% of government revenues and more than 40% of GDP, a dependency that shapes annual capital spending and the bankability of public-private partnership (PPP) deals. Earlier this year, the IMF forecast GDP growth of 3%-4%. In light of the latest regional conflict dynamics involving the US and Israel with Iran, that growth outlook is expected to soften as investor risk perceptions rise and supply chains face renewed stress.
Even so, Iraq’s projects market is not starting from a blank slate. By the end of March 2026, almost $120bn of contracts were in execution, with a further $300.4bn in the broader pipeline. The scale of that opportunity is underpinned by enduring reconstruction requirements, urgent energy-sector needs and a policy push to translate oil wealth into long-lived productive assets.
Reconstruction needs
Nearly a decade after the official end of the Islamic State conflict, Iraq’s reconstruction gap remains substantial. Estimates put the shortfall at about $88bn, reflecting the long tail of damage to housing, utilities, public buildings and transport links. Southern and central regions dominate the live pipeline, largely because they sit close to Iraq’s oil heartlands. Basra, in particular, is pivotal, anchoring major upstream activity and vital export infrastructure.
At the policy level, Iraq Vision 2030 signals a long-term ambition to diversify into tourism, agriculture, industry and digital transformation. The government’s immediate delivery vehicle is the National Development Plan (NDP) 2024-28, which commits more than $17bn a year in capital expenditure and prioritises energy, transport, housing and water infrastructure. This shift is reinforced by Iraq’s Green Growth Framework (2026), indicating that future procurement may place greater weight on efficiency, emissions reduction and climate resilience.
Macro risk
Despite policy ambition, the most immediate determinant of Iraq’s fiscal room is the oil price. A $10-a-barrel drop can reduce government revenue by an estimated $7bn-$9bn annually. Such sensitivity matters because infrastructure spending is still largely funded by the public purse. Oil price swings affect project awards, payment cycles and the government’s willingness to assume up-front capex obligations.
Iraq’s execution environment continues to be defined by bureaucratic delays, unclear land titles and opaque procurement processes. These factors can add 12-24 months to average delivery timelines. Nevertheless, there are signs of adaptation. PPP legislation is advancing, and developer-led models are gaining traction in large housing programmes. Furthermore, there is a growing reliance on international project management consultancy (PMC) firms—such as Hill International, Worley, and AtkinsRealis—to bridge capacity gaps and improve governance, cost control and scheduling.
Hydrocarbon driver
Oil and gas upstream remains the single largest driver of capital expenditure. Major developments, including the Gas Growth Integrated Project (GGIP) and Mansouriya, sit alongside a push to reduce gas flaring and expand downstream processing. The objective is to sustain export revenues while improving domestic fuel availability.
The power sector is even more urgent. Iraq faces an estimated 8-10GW generation shortfall, which keeps electricity supply at the centre of political risk. This gap is driving rapid procurement of generation capacity and grid upgrade contracts. Beyond traditional infrastructure, Iraq is also moving on digital adoption. Smart city pilots and fibre rollouts are attracting regional technology investors, while AI-enabled data centre projects are beginning to emerge.
Investment targets
Foreign direct investment (FDI) remains below $3bn a year, a low figure relative to market size. The most active investors outside the oil sector include the UAE, Saudi Arabia and Kuwait. To convert interest into deals, the National Investment Commission (NIC) is pursuing streamlined licensing and investor-protection reforms. A “one-stop shop” approach has reportedly reduced registration timelines for foreign investors from months to weeks in key sectors.
Investor protection mechanisms, such as access to international arbitration, are being strengthened, though enforcement remains a concern. Iraq’s three free zones—Basra, Karbala and Nineveh—offer additional incentives including tax holidays and customs exemptions, provided they can be paired with reliable utilities and bankable arrangements.
Conflict premium
The latest escalation involving the US and Israel with Iran has increased Iraq’s security risk premium. This is inflating materials costs and disrupting supply chains near eastern border zones. Even where projects are far from conflict areas, contractors are pricing in higher contingency for logistics and insurance. Iraq must also balance deep economic ties with Iran—particularly in energy—with Western investor expectations and sanctions-related compliance.
With more than 60% of its population under 25, Iraq has a potential demographic dividend, but it also faces immediate employment pressure and a shortage of skilled technical labour. Iraq’s projects market outlook for 2026 is best described as cautiously constructive. The pipeline is deep and the need is undeniable, but delivery will hinge on whether Iraq can translate plans into predictable execution. If progress on procurement and contract enforcement continues, Iraq can sustain a broad-based market that extends beyond hydrocarbons.
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Retal to develop project in Oman’s Sultan Haitham City
11 May 2026
Saudi Arabia’s Retal Urban Development Company has entered Oman with its first development agreement, signing a deal to build more than 2,000 residential units in Sultan Haitham City in Muscat.
In a statement to the Saudi Stock Exchange (Tadawul) on 11 May, the company said it had signed an agreement with Oman’s Ministry of Housing & Urban Planning to develop an integrated residential community at an estimated cost of SR3bn ($823m).
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Retal said the development will be delivered through an off-plan sales model and is expected to take nearly nine years to complete.
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US-based architectural firm SOM unveiled masterplan proposals for Sultan Haitham City in August 2024.
The final phase of the project is expected to be completed by 2045.
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Qiddiya seeks firms for light rail transit system
11 May 2026
Saudi gigaproject developer Qiddiya Investment Company (QIC) has requested contractors to express interest in a contract to design and build the first phase of the light rail transit system at Qiddiya Entertainment City.
The notice was issued on 5 May, with firms given until 20 June to submit expressions of interest.
The project, also known as the Primary Urban Axis, comprises a 22-kilometre automated, driverless rail line as part of its first phase.
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QIC is accelerating plans to develop additional assets at Qiddiya City.
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The Qiddiya high-speed rail project, also known as Q-Express, will connect King Salman International airport and the King Abdullah Financial District (KAFD) with Qiddiya City. The line will operate at up to 250 kilometres per hour, reaching Qiddiya in 30 minutes.
Contractors are also preparing bids for a 13 May deadline for a contract covering new infrastructure works at Qiddiya Entertainment City. The scope includes two infrastructure development packages for District 0, including the construction of four event park-and-ride facilities.
QIC’s other major projects include an e-games arena, Prince Mohammed Bin Salman Stadium, a motorsports track, the Dragon Ball and Six Flags theme parks, and Aquarabia.
QIC officially opened the Six Flags theme park to the public in December last year.
The park covers 320,000 square metres and features 28 rides and attractions, including 10 thrill rides and 18 aimed at families and young children.
The Qiddiya project is a key part of Riyadh’s strategy to boost leisure tourism in the kingdom.
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RCRC awards $1bn Sheikh Jaber Al-Sabah Road contract
11 May 2026
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Saudi Arabia’s Royal Commission for Riyadh City (RCRC) has awarded an estimated SR5bn ($1.3bn) contract for the construction of the Sheikh Jaber Al-Sabah Road project in Riyadh.
The contract was awarded to the joint venture of Riyadh-based Al-Rashid Trading & Contracting Company (RTCC) and Turkiye’s IC Ictas.
The project stretches 12 kilometres (km) from Khurais Road to Al-Thumama Road in Riyadh.
The Sheikh Jaber Al-Sabah Road project is a key component of the Second Eastern Ring Road scheme.
The project includes the construction of five interchanges: Prince Bandar interchange, King Abdullah interchange, Imam Abdullah interchange, Dammam Road interchange and Al-Thumama interchange.
The latest contract marks another significant project award to the RTCC-IC Ictas joint venture by RCRC.
In June 2024, RCRC awarded an estimated SR4bn ($1bn) design-and-build contract to upgrade the Wadi Laban cable bridge in Riyadh to the joint venture of RTCC and IC Ictas.
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The construction of the bridge originally began in August 1993 and was completed in 1997.
The existing bridge is 763 metres long and 35 metres wide, with two 14-metre-wide carriageways.
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Aecom to supervise Dubai Loop construction
11 May 2026
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US-based Aecom has been selected for a contract to undertake design review and construction supervision services for the Dubai Loop transportation system.
The contract was tendered by Dubai’s Roads & Transport Authority (RTA), which signed a construction agreement with Elon Musk-backed firm The Boring Company.
The first phase comprises a 6.4-kilometre route with four stations, linking the Dubai International Financial Centre (DIFC) and Dubai Mall.
Stations will be located at DIFC 2, ICD Brookfield Place, Dubai Mall Zabeel Parking and Burj Khalifa.
The first phase is expected to cost about AED565m ($154m) and be delivered within one year of design work and other preparations being completed. Tunnelling is expected to begin in the second half of this year.
The latest update follows the appointment of Parsons Corporation to deliver programme management services for the Dubai Loop transportation system.
Next phase
The second phase will connect the Dubai World Trade Centre and DIFC with Business Bay.
The tunnels will extend up to 22km and include 19 stations.
The total cost across both phases is expected to be around AED2bn ($545m), with completion scheduled within three years.
The pilot route is expected to serve around 13,000 passengers a day, while the full route is projected to have a capacity of about 30,000 passengers a day.
The RTA and The Boring Company signed a memorandum of understanding on the sidelines of the World Governments Summit in Dubai in February last year to explore the development of the Dubai Loop transportation system.
The Dubai Loop is expected to be similar to The Boring Company’s Las Vegas Convention Centre (LVCC) Loop project. The LVCC Loop is a 2.7km underground tunnel system that connects different convention centre halls, reducing walking time across the site to about two minutes.
The LVCC Loop has been in operation since 2021. It uses Tesla Model 3 cars to carry passengers between five stations. The Boring Company began construction in November 2019 at an estimated cost of $49m.
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