Metrojuna Kaitaan metroasemalla.

West Metro

The West Metro is different from the trunk metro line both in terms of structure and technology.

Metro traffic to Matinkylä began in 2017

On Saturday 18 November 2017, the metro passenger transport ran for the first time up to Matinkylä, Espoo. This was a historical achievement, as a change of this scope to the metro network has not been made since the Helsinki Metro opened in 1982.

Metropolitan Area Transport Ltd (formerly known as Helsinki City Transport, HKL) started hosting and monitoring eight new stations all at once, in addition to the 17 previous stations. The areas to be controlled multiplied in terms of floor area, cubic capacity and kilometres. Since the western stations and tunnels had been restricted construction sites until now, the various employee groups and subcontractors started their work by getting to know the new infrastructure. Persons such as operators, maintenance employees and security guards needed to learn about the routes, staff facilities and exit routes before traffic started.

The West Metro is different from the trunk metro line both in terms of structure and technology. The track profile is varying: compared to the trunk metro line, the West Metro has steeper downhill and uphill sections, and the distances between stations are longer. The technical systems are more advanced than in the eastern section, and there is much more automation. The volume of technology to be monitored at the stations and in the tunnels is growing immensely.

Focus on travel safety

Our experts work hard to make travelling smooth, pleasant and safe. We focus on this goal in traffic control operations, technical control rooms and security control rooms, among others. The travel chain should go smoothly from the moment the passenger steps in through the station doors until they leave the destination station. This involves the station doors opening smoothly, the lifts and escalators functioning, and the security guards being present on the trains and at the stations according to plans.

The camera, lock and monitoring systems should function without issues. The number of cameras and doors to be controlled grew significantly along with the new rail section. The western parts of the metro track are monitored via hundreds of new cameras, from the ticket sales areas to the platforms and tunnels. For example, there are over 1,500 new doors that require monitoring. These include doors at station entrances, technical facilities and emergency exits. All this also means that there are multiple monitors to be followed at the control rooms.

The metro line is expanding from Matinkylä to Kivenlahti

In the second phase of metro construction, a seven-kilometre-long track and five new stations will be built: Finnoo, Kaitaa, Soukka, Espoonlahti and Kivenlahti. An underground metro depot will be built in Sammalvuori.

The metro will run from Matinkylä to Kivenlahti in two parallel underground tunnels throughout the journey.

The metro will start operating from Matinkylä to Kivenlahti in 2023, according to estimates. The schedule will become more precise as the station-specific testing progresses.

New depot for West Metro

The metro depot built by Länsimetro Oy (West Metro) is located in Sammalvuori, Espoo. The construction work was completed in 2020. Metropolitan Area Transport Ltd has launched the measures needed for commissioning the depot. The depot has overnight facilities for 20 train units as well as the necessary maintenance operations.

The entire depot is heated with geothermal heat and cool groundwater is utilised for its cooling system. The depot will start to see real action in 2023 when the metro starts to operate to Kivenlahti.


  • Location
    • underground in Sammalvuori, Espoo, between Espoonlahti and Kivenlahti metro stations
  • Operations
    • overnight facilities and maintenance operations for metro carriages
  • Capacity
    • overnight facilities for 20 train units