Because of the large outing traffic (as late as 1950 Sundays were far busier than weekdays on the Klampenborg branch) Klampenborgbanen was a natural first choice when the decision to electrify the local rail traffic around Copenhagen was taken, and the first S-trains ran in 1934.
Due to substantial weekend passenger traffic (as late as 1950, Sundays were busier than weekdays on the Klampenborg branch), Klampenborgbanen was a natural choice when the decision to electrify local rail around Copenhagen was made, and the first S-trains began operation in 1934.