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Hanoi underground rail system

In 2016, Colas Rail was awarded a contract with Alstom and Thales for the construction of Line 3 of the Hanoi underground system in Vietnam.

By the end of 2021, this 12.5-kilometre line will serve twelve stations, 4 of which will be underground, between Hanoi station and the town of Nhon, to the west of the capital. Note: 8.5 km of the line will be built on a viaduct and 4 km in a tunnel.  

The contract covers three lots:

  • Lot 6: high-voltage equipment and the equipment for a maintenance depot.
  • Lot 7: electro-mechanical works, the ventilation/smoke extraction system in the tunnel and the stations, air conditioning, fire protection and detection, escalators and lifts and the water pumping system.
  • Lot 8: track works.

Key Figures

  • km of lines

  • stations built