The Helsinki City Rail Loop (Finnish: Pisararata, Swedish: Centrumslingan) is a planned new railway line in Helsinki, Southern Finland. It will be a double track balloon loop in the shape of a tear drop. Helsinki commuter rail currently terminating at Helsinki Central railway station would be diverted into tunnels under the city centre. New below-ground stations would be created in Töölö (west), Helsinki city centre (south) and Hakaniemi metro station (east), with a possible fourth station at Alppila (north) depending on how the connection to the main line is made in relation to the existing northern Pasila railway station. The new tracks will be 7 kilometres (4 mi) long.