If transporting oversized goods on the roof of a car, how many meters beyond the rear axle of the vehicle can the end of the transported object extend at most?

In New Zealand, when transporting excessively long items on the roof of a vehicle, the end of the item may extend up to 4 meters beyond the rear axle of the vehicle. The correct answer is: 4 meters. For reference: regarding vehicle loading, the front may not exceed 3 meters, and the rear may not exceed 4 meters. Remember: front no more than 3, rear no more than 4.