ɪn mˈoʊst kˈeɪsᵻz, ðə lˈaɪn mˌeɪks jˈuːs ʌvðɪ ɛntˈaɪɚ wˈɪtθ ʌvðə tɹˈæk tə lˈɛŋθən ðə ɹˈeɪdɪəs əvə tˈɜːn: ˈɛntɚɹɪŋ æt ðɪ aʊtsˈaɪd ˈɛdʒ, tˈʌtʃɪŋ ðə "ˈeɪpɛks"—ɐ pˈɔɪnt ɔnðɪ ɪnsˈaɪd ˈɛdʒ—ðˈɛn ˈɛɡzɪɾɪŋ ðə tˈɜːn baɪ ɹᵻtˈɜːnɪŋ aʊtsˈaɪd.
In most cases, the line makes use of the entire width of the track to lengthen the radius of a turn: entering at the outside edge, touching the "apex"—a point on the inside edge—then exiting the turn by returning outside.