Frederikssundbanen

Frederikssundbanen is one of six radial S-train lines in Copenhagen; it connects the city center with a number of Northwestern suburbs (notably Herlev and Ballerup) and other townships until Frederikssund on the Western coast of the Nordsjælland peninsula.

Passengers to stations farther out would ride the S-train to Vanløse and change to steam trains (later diesel) there.

In 1949 S-train service was extended to Ballerup, and at the same time the line was double-tracked as far as Herlev.

At this time, the line's terminus in Frederikssund was restored to its original central location.

Uniquely for an S-train line, several level crossings were retained after the electrification of the Ballerup-Frederikssund part.