TRANSPORT, WATER - ASIA | SECTORS
Electricity transmission tunnel
Singapore Indonesia
Malaysia Thailand
Philippines Vietnam
0 5,000 10,000 15,000 20,000
Vietnam In mid-2025, breakthrough was achieved by Ghella on the first metro with a section underground in the capital, Hanoi. TBM ‘Than Toc’ (‘Flash’) reached Station S11 on the Pilot Light Metro Line 3. Arrival of the 6.6m-diameter Herrenknecht earth pressure balance (EPB) machine marked 80% completion of excavation. Two shields are boring the project’s twin tube tunnels. Pilot Light Metro Line 3 extends 12.5km, connecting
Nhon, located in the Tay Tuu neighborhood of Nam Tu Liem district, in western Hanoi, to Hanoi station. The line consists of a 4km-long underground portion. Four of the stations are underground: Kim Ma; Cat Linh; Van Mieu; and, Hanoi.
Singapore Civil construction works for Phase 2 of the Cross Island Line (CRL) in Singapore have officially commenced recently with ground-breaking at the future Clementi station. Singapore’s Land Transport Authority (LTA) has is developing the CRL Phase 2 (CRL2) project to extend
25,000 30,000 35,000 40,000 45,000 50,000 Above: South-East Asia – Tunnel Construction Project Pipeline, Value By Country and Type ($m) SOURCE: GLOBALDATA
the metro line westwards, adding 15km on to the 29km operating under Phase 1. Development of Phase 2 will involve construction
of six underground stations, two of which are to be interchanges. The CRL King Albert Park station is to connect commuters to the Downtown Line (DTL), and will be Singapore’s deepest metro station; CRL Clementi station is to link with the East-West Line (EWL). A 5km-long tunnel is to be constructed by TBM, of 12.8m-diameter, between CRL Bright Hill and CR14 stations, and passing below the Central Catchment Nature Reserve, (CCNR). Tunnelling works towards the CCNR started in Q2-2025, along with ongoing ground improvement works. LTA has awarded nine civil contracts for the
construction of CRL2. The CRL2 extension is planned to be completed and brought into service by 2032.
Project Insight - Global Tunnel Construction Projects: Q3- 2025, from GlobalData. Go to:
www.globaldata.com
Railway tunnel
Road tunnel
Water & sewage tunnel
Left: TBM ‘Than Toc’ (‘Flash’) breakthrough on Hanoi metro line project, Vietnam
January 2026 | 39
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