Muted public spending hinders global tunnelling
4 April 2025
This package also includes: Traffic drives construction underground
The pipeline of tunnel construction projects around the world as tracked by GlobalData stands at $1.3tn, encompassing projects from announcement to execution.
The total pipeline value reflects the overall values of projects that are either entirely tunnels or that have tunnels as an integral part of the work. The project pipeline includes tunnelling works across a range of sectors, including road and railway development, as well as water and sewerage.
The pipeline of tunnel construction projects around the world currently stands at $1.3tn
Subdued spending
Public spending is anticipated to remain muted globally in the short term, as governments are still trying to curtail expenditure to reduce public debt, thereby constraining investments in public infrastructure. This is affecting the demand for tunnel construction, which heavily relies on public infrastructure development. Elevated construction material prices, high interest rates and labour and skill shortages are expected to discourage new investment, further reducing demand for tunnel construction.
These challenges have already impacted project viability, leading to the withdrawal or postponement of funding for 50 projects in Australia’s $78.6bn infrastructure investment programme due to cost increases of over $21bn. The conflicts in Russia and Ukraine, the situation in Gaza and disruptions to shipping in the Red Sea are weighing on new investment levels, particularly in Eastern Europe and the Middle East and North Africa region due to increased uncertainty.
However, this decrease in new tunnel investment is not expected to be uniform globally, as China’s significant infrastructure investment drive, the US’ Infrastructure and Jobs Act and India’s various infrastructure investment programmes are driving new investment in their respective regions.
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> Middle East and North Africa (Mena) |
> Western Europe
Western Europe has a tunnel construction project pipeline valued at $329.5bn, with Switzerland leading with $60.6bn of projects, follwed by Germany with $56.8bn. Notable projects include the Turin-Lyon tunnel and the Genoa underwater tunnel. Projects in pre-execution and execution stages total $222.8bn, with the highest-value project being Zurich’s $38.8bn CST (underground cargo) Freight Metro Tunnel.
> Northeast Asia
Northeast Asia’s tunnel construction pipeline is valued at $327.7bn, with China contributing $220.3bn, including the $42.4bn Dalian-Yantai undersea railway tunnel. Japan has projects worth $101.3bn, primarily the $65.2bn Tokyo to Nagoya Maglev Railway Line. Most projects are in later development stages, totalling $198.3bn, or 69.8% of the pipeline.
> Australasia
Australasia’s tunnel construction pipeline totals $150.1bn, with Australia holding $112.9bn, about 75% of the region’s value. The largest project is the $87bn Melbourne Suburban Rail Loop, a 90km rail loop with 13 stations. Construction on six stations began in 2022, with the entire project expected to finish by 2050, though rising costs and labour shortages may affect this.
> North America
North America’s tunnel projects are valued at $92.4bn, with $63.6bn in pre-execution and execution stages. The pipeline includes 921.8km of tunnels, primarily in the US. Railway tunnels are the largest segment at $40.7bn, with the Hudson River Rail Tunnel being the highest-value project at $16bn.
> Southeast Asia
Southeast Asia’s tunnel pipeline is valued at $91.3bn, with $55.1bn under construction. Singapore leads with $45.2bn, mainly from rail tunnel projects. The Land Transport Authority awarded a $199m contract for tunnels connecting MRT stations as part of the Cross Island Line’s second phase.
> Eastern Europe
Eastern Europe’s pipeline is valued at $56.3bn, with $46.9bn in pre-execution and execution stages. Major contributors include Turkiye, Czechia and Romania, which has the largest share at $16.3bn. The $9bn Bucharest Metro Line 5 is a key project expected to complete by 2033, with spending projected to rise in the coming years.
> South Asia
South Asia’s tunnel construction pipeline is valued at $47.9bn, with India contributing $31.9bn, primarily from road tunnels. A notable project is the $1.3bn Thane to Borivali underground tunnel. The pipeline includes 2,043.7km of developments, with spending expected to reach $1.8bn in 2024.
> Latin America
Latin America has a growing tunnel construction pipeline valued at $30.3bn, with $28.7bn in later development stages. The region includes 276.2km of projects, with Colombia leading at 92.1km. The highest-value project is the $9.6bn Bogota Metro, which began construction in early 2021.
> Sub-Saharan Africa
Sub-Saharan Africa’s tunnel construction pipeline is valued at $6.7bn, with 63.7% in pre-execution and execution stages. The pipeline includes 1,580km of projects, primarily in Tanzania, Ethiopia and Kenya. Spending may reach $685.4m in 2025, but investment constraints may limit new projects.
In conclusion, while the global tunnel construction industry faces challenges due to muted spending, high construction material prices and geopolitical uncertainties, significant infrastructure investment initiatives in countries like China, the US and India are expected to continue driving new investment.
Traffic drives construction underground
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