The Northwest Line (Danish: Nordvestbanen), also referred to as the Kalundborg Line (Danish: Kalundborgbanen), is a 79.3 km (49.3 mi) long, state-owned double track passenger railway line between roskilde and Kalundborg in the western part of the island of Zealand. The railway is owned by Banedanmark and the service is operated by DSB between Copenhagen Central Station and Kalundborg.
Northwest Line (Denmark) Wikipedia
The railway was established as a result of the Railway Act of 29. February 1869. The rail line opened in 30 December 1874..