Levers connected to the base block of the sign are toggled down when conditions match. When the sign is powered, the track above is also switched towards the statement-assigned direction when the condition matches. When the switcher sign is powered by redstone, or by using [+train], then it will switch the track based on the statements on the sign. This can cause trains to reverse on straight rail sections. If the sign is used primarily to toggle a lever when the statement conditions match, then [-train] should be used so this does not happen.
当条件匹配时，连接到道岔基础方块的拉杆会被切换为向下。当道岔激活，且条件匹配时，上方的铁轨也会切换到语句指定的方向。当道岔被红石激活，或使用 [+train] 时，道岔将根据语句切换铁轨。这可能会导致列车在直行轨道部分上倒车。如果道岔主要用于在语句条件匹配时切换拉杆，则应使用 [-train] 以避免发生这种情况。