In the US, studies have shown that doubling the size of a road can simply double the traffic, taking us back to the starting point.

研究表明，在美国，将道路的规模扩大一倍，只会使交通量增加一倍，这样我们又回到了事情的起点。

youdao

In the US, studies have shown that doubling the size of a road can simply double the traffic, taking us back to the starting point.

研究表明，在美国，将道路的规模扩大一倍，只会使交通量增加一倍，这样我们又回到了事情的起点。

youdao