因為插件在自動尋路時會設定最短路徑,但有時候這個路徑會造成進路衝突。舉個例子,如果希望列車在複線軌道上只朝一個方向行駛,可以使用blocker控制牌,讓插件計算路徑時把可能造成反向行車的路徑排除在外。
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.