Then the rain came and the red flag went up to signal a halt.

当时，雨下了起来，红旗被升起，发出停止的信号。

《柯林斯英汉双解大词典》

As Finley was doing his research, tornado forecasting came to a screeching halt when the Signal Corps banned the word "tornado" from official forecasts because they were concerned the word would cause widespread panic.

CNN: STORY HIGHLIGHTS

When the signal at Gadadharpur Halt turned green, the Uttar Banga Express had moved on to its next scheduled stop of Sainthia.

BBC: Driver 'error' led to West Bengal train crash

Thanks to spotty Wi-Fi coverage, we'd go a short distance, talking naturally, then halt as the robot lost signal, or veered off.

WSJ: Working With Robot Rachel