A recent study on alternative road materials concluded that the cost associated with noise-related health impacts would favour one type of material. In the analysis, the noise of road and vehicles was allocated fully to the road. If we would only allocate a part to the road and the rest to the vehicles, an opposite conclusion could be drawn. We therefore argue for a closer study of this allocation problem, and for the use of sensitivity analyses as long as no good solution has been found.

中文翻译：

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是什么发出噪音：车辆还是道路？

最近一项关于替代道路材料的研究得出结论，与噪音相关的健康影响相关的成本将有利于一种材料。在分析中，道路和车辆的噪声被完全分配给了道路。如果我们只分配一部分给道路，其余的分配给车辆，则可能得出相反的结论。因此，我们主张对这个分配问题进行更深入的研究，并且只要没有找到好的解决方案就可以使用敏感性分析。