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Under standard dimension rules for an ordinary non-agricultural rigid truck, how far may the vehicle or its load extend forward from the front edge of the driver’s seat in its rearmost position?
按标准尺寸规则，对普通非农用刚性卡车，驾驶座调到最后位置时，车辆或货物最多可以超出驾驶座前缘多远？
With the driver's seat in its rearmost position, maximum forward overhang from the front edge of that seat is 3 metres.
驾驶座位于最后位置时，从座位前缘到货物或车辆最前端的前悬上限为3米。
阅读相关知识
Do not measure an additional 3 metres from the front of the vehicle. Other dimensions, route clearances and load-security requirements must also be met.
不是从车辆车头往前另加3米；其他适用尺寸、路线净空与货物固定要求也须满足。