因为插件在自动寻路时会设定最短路径,但有时候这个路径会造成进路冲突。举个例子,如果希望列车在复线轨道上只朝一个方向行驶,可以使用blocker控制牌,让插件计算路径时把可能造成反向行车的路径排除在外。
With [+train:left] trains coming from the left are blocked, only allowing movement from right to left. Similarly, [+train:right] and other directions can be used.