Denmark Region, which encompasses the Copenhagen metropolitan area with the exception of the subtracted province East Zealand but includes the Baltic Sea island of Bornholm, has a population three times larger than that of North Denmark Region, which covers the more sparsely populated area of northern Jutland. Under the county system certain densely populated municipalities, such as Copenhagen Municipality and Frederiksberg, had been given a status equivalent to that of counties, making them first-level administrative divisions. These "sui generis" municipalities were incorporated into the new regions under the 2007 reforms. The Kingdom of Denmark is a unitary state that comprises, in
History of Copenhagen war. In the 1970s, the so-called five-finger-plan provided commuter train links to the surrounding towns and suburbs. In 1992 construction on the Copenhagen Metro and in 1993 development of a new city area, the Ørestad, began on the island of Amager. The metro underground train system opened for traffic in 2002. Since the summer of 2000, the cities of Copenhagen and Malmö have been connected by a toll bridge, the Øresund Bridge, for both rail and road traffic. It was inaugurated in July 2000 by Carl XVI Gustaf of Sweden and Margrethe II of Denmark. As a result, Copenhagen has