Since 1 January 2003, ProRail is the independent infrastructure manager of the Dutch railway tracks. It was established by merging three divisions: Railinfrabeheer, Railned and Railverkeersleiding. ProRail's principal task is: ensuring capacity, reliability and safety on and around the tracks. This makes ProRail responsible for all aspects of the Dutch rail infrastructure. This includes new constructions, infrastructure maintenance and upkeep, controlling train traffic, giving operators access to the track, and capacity distribution.