香港新界的公路最近經常發生嚴重交通意外，例如最近屯門的致命交通意外，請問有何實際可行方法避免這些事情發生？

There is no practical method.

In theory, there are always methods to reduce traffic accidents. However, most of the practical methods require government intervention (such as tighter enforcement, higher safety standard, etc.)

Without the government's active involvement, the only method to avoid accidents is to avoid the area at all, which is not practical.

Hence - no practical method.