danger signal

Noun

also figuratively

(rail transport) A signal set at danger and showing a red light or other stop indication, which a train driver must not pass until it changes or until manually cleared past the signal by a dispatcher.

Japanese Meaning

（鉄道輸送における）危険信号。これは、信号が危険状態に設定され、赤色の光またはその他の停止表示が点灯しており、列車の運転士は信号が変化するか、又は指令者により手動で先行区間の解放が行われるまで通過してはならない信号を指す。

What is this buttons?

The driver halted the train at the danger signal and contacted the dispatcher for clearance before proceeding.

Google Translation / DeepL Translation

運転士は停止信号（赤表示で、信号が変わるか運行指令が手動で通過許可を出すまで通過してはならない）で列車を停め、進行の許可を得るために指令へ連絡した。

Details

Sense（1）

On a train travelling at say 40 miles per hour a driver would have to react quite quickly to bring his train to a halt at a danger signal even if he could see that signal half a mile away.

Google Translation / DeepL Translation

Details

Sense（2）

(also figurative) An indication that a potentially bad or dangerous situation could develop.

danger signals

（ plural ）

Details

danger signal

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