The single S-train track from Enghave to Valby was doubled in 1941, at the same time as the S-train line was extended to Vanløse (on the Frederikssund radial).
ðə sˈɪŋɡəl ˈɛstɹˈeɪn tɹˈæk fɹʌm ɛŋɡˈeɪv tə vˈælbi wʌz dˈʌbəld ɪn nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wˈʌn, æt ðə sˈeɪm tˈaɪm æz ðɪ ˈɛstɹˈeɪn lˈaɪn wʌz ɛkstˈɛndᵻd tə vˈænloʊs ɔnðə fɹˈɛdɚɹˌɪksʌnd ɹˈeɪdɪəl.