ðə sˈɛntɹəl kˈeɪsɪŋ mˈiːnz ðæt ʃiː kæn ˈoʊnli kˈæɹi wˈʌn lˈeɪn ʌv kəmˈɜːʃəl vˈiəkəlz dˌaʊn ˈiːtʃ sˈaɪd ʌvðə kˈɑːɹ dˈɛk.
The central casing means that she can only carry one lane of commercial vehicles down each side of the car deck.