Each intersection point would have to be made into an overpass and under pass.
Each intersection point would have to be made into an overpass and under pass.
在每一个交点处都有一条是地面通道，一条是地下通道。
Each intersection point would have to be made into an overpass and under pass.
在每一个交点处都有一条是地面通道，一条是地下通道。