In high-speed operations, it is highly possible that, for train protection (or to stop other trains for protection), use of fuses and short-circuiting-rails devices, both of which are used in regular railway lien operations, is inadequate.
高速走行を行うため、在来線と同じ信号炎管や軌道短絡器による列車防護（他の列車を停止させること）では他の列車が停止しきれない可能性が高まる。