example Kone- ja Siltarakennus and the Elanto factories. The area has included the Suvilahti gas plant and the Hanasaari Power Plant which is still active. Residential use The city proper gradually grew too tight for industrial activities, which moved away to the suburbs. Converting old industrial premises to residential areas started in Merihaka in the 1970s and is still ongoing. A new Lintulahti residential area has been built on the old industrial area of Sörnäinen, as well as jobs, cultural services and the Helsinki Theatre Academy. The Sörnäinen harbour, which had been in use for over a century, was shut down in November 2008 after the completion of the Vuosaari Harbour. The immediate surroundings are being developed in accordance of the changed nature of the area. Along with the rest of the city proper, Sörnäinen, Alppiharju and Kallio are among the most tightly-built areas in Helsinki and in the whole of Finland. The percentage of small apartments is the largest in Helsinki: a whole 80 percent. Because of the small size of the apartments, most of the residents are young adults living alone, or elder or childless couples. A new marine Kalasatama area is being built as part of the eastern part of the city proper in the Sörnäinen harbour area and its surroundings from the 2010s to the 2030s. It will house 25 thousand inhabitants and 10 thousand jobs. The old harbour areas of Sompasaari and Nihti are also being converted into residential areas. Traffic In the eastern part of the city proper, the number of cars in proportion to the population is the smallest in the entire city of Helsinki. The area is well served with basic services which are often close by. The Sörnäinen area is served by almost all bus lines going from the city centre to northeastern and eastern Helsinki as well as eastern Vantaa, along with several through-city lines. Particularly the so-called Sörnäinen curve is a traffic hub for many public transport lines. Many Helsinki tram lines run along Hämeentie, and the Sörnäinen metro station was taken into use and the Kalasatama metro station in 2007. The public transport connections from the area to all around the capital region are excellent. See also Hermanni (Helsinki) Kalasatama Merihaka Suvilahti References External links