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.
klˈæmpənbˌoːɹɡbeɪnən wʌzɐ nˈætʃɚɹəl fˈɜːst tʃˈɔɪs wɛn ðə dᵻsˈɪʒən tʊ ᵻlˈɛktɹᵻfˌaɪ ðə lˈoʊkəl ɹˈeɪl tɹˈæfɪk ɚɹˈaʊnd kˌoʊpənhˈeɪɡən wʌz tˈeɪkən, ænd ðə fˈɜːst ˈɛstɹˈeɪnz ɹˈæn ɪn nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi fˈoːɹ.