Rail Baltica is an under-construction rail infrastructure project that is intended to integrate the Baltic states in the European rail network. Its purpose is to provide passenger and freight service between participating countries and improve rail connections between Central and Northern Europe, specifically the area southeast of the Baltic Sea. It is also intended as a catalyst for building the economic corridor in Northeastern Europe. The project envisages a continuous rail link from Tallinn (Estonia) to Warsaw (Poland), consisting of links via Riga (Latvia), Kaunas, and Vilnius (Lithuania). Its total length in the Baltic States is 870 kilometres (540 mi), with 213 kilometres (132 mi) in Estonia, 265 kilometres (165 mi) in Latvia, and 392 kilometres (244 mi) in Lithuania. Rail Baltica is one of the priority projects of the European Union (EU). It is part of the North Sea–Baltic Corridor of the Trans-European Transport Networks (TEN-T).

The Finnish railway network consists of a total track length of 9,216 km (5,727 mi). The railways are built with a broad 1,524 mm track gauge, of which 3,249 km (2,019 mi) is electrified. Passenger trains are operated by the state-owned enterprise VR that runs services on 7,225 km (4,489 mi) of track. These services cover all major cities and many rural areas, though the coverage is less than the coverage provided by the bus services. Most passenger train services originate or terminate at Helsinki Central railway station, and a large proportion of the passenger rail network radiates out of Helsinki. VR also operates freight services. Maintenance and construction of the railway network itself is the responsibility of the Finnish Rail Administration, which is a part of the Finnish Transport Agency. The network consists of six areal centres, that manage the use and maintenance of the routes in co-operation. Cargo yards and large stations may have their own signalling systems.