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An ordinary truck towing a heavy trailer (trailer GLW over 3,500 kg) has a gross combination weight of 25,500 kg. What is the lowest required full licence class, excluding special tractor exceptions?
普通卡車牽引重型掛車（掛車GLW超過3500公斤），組合GCW為25500公斤，不涉及特殊拖拉機例外時，最低需要哪類全駕照？
Class 5 is the lowest required full licence class.
Class 5。
閱讀相關知識
An ordinary combination exceeding 25,000 kg GCW falls within Class 5. The question excludes light-trailer and special tractor exceptions; vehicle structure matters as well as weight.
普通組合車輛GCW超過25000公斤屬於Class 5範圍。本題已排除輕型掛車及特殊拖拉機的類別例外，不能只看總數字就忽略車輛結構。