Northwest Line (Denmark)
The Northwest Line, also referred to as the Kalundborg Line, is a long, state-owned single 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.
The busiest station on the line is Holbaek, and the section from Roskilde to Holbaek was doubletracked in 2014 and electrified in 2021. The remainder is due for electrification and upgrading to ERMTS level 2 in the future.