= Placement = [[Image:Track switcher example 1.png|thumb|right|Empty minecarts are blocked]] [[Image:TrainCarts sign example 2.png|thumb|right|Trains are switched left and right using a 1:1 counter]] Each sign targets a certain track piece above. Signs attached to walls take the block they are attached to and look up until they find a piece of track. That track is then used for that sign. Sign posts look up until they find a piece of track. There may not be blocks without signs between the bottom sign and the tracks.
每个控制牌都以上方的某个铁轨为目标。附着在墙上（即方块侧）的控制牌会基于附着的方块向上寻找，直到找到铁轨。随后该铁轨将由该控制牌控制。控制牌柱会向上寻找，直到找到轨道。底部控制牌和轨道之间必须要有控制牌附着的方块。
