单选题 · 选择一个答案
Within standard dimensions, what is the maximum forward distance for a heavy rigid vehicle fitted with a tow coupling?
标准尺寸下，装有牵引连接装置的重型刚性车辆，最大前向距离是多少？
A standard heavy rigid vehicle fitted with a tow coupling has a maximum forward distance of 8.5 metres.
装有牵引连接装置的标准重型刚性车辆，最大前向距离为8.5米。
阅读相关知识
The usual limit without a tow coupling is 9.5 metres. This is not the measurement or limit for a semi-trailer or every heavy vehicle.
无牵引连接装置的重型刚性车辆通常为9.5米；本题不是半挂车或任意重型车辆的共同量法。