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What is the maximum speed limit for a heavy motor vehicle towing a semi-trailer or semitrailers?
重型機動車牽引一輛或多輛半掛車時，最高限速是多少？
A heavy truck towing a semi-trailer has a maximum speed limit of 90 km/h, subject to any lower posted limit.
重型卡車牽引半掛車的最高限速為每小時90公里，並須服從更低的道路限速。
閱讀相關知識
Visibility, weather, road conditions, load or permit conditions may require a lower speed. The maximum is not a target for every situation.
視距、天氣、路況、載重或許可條件可能要求更慢；不能將90公里當作所有情形都可達到的速度。