Press Space A wig wag, or Auto-Flagman is a type of old US Railroad crossing signal, meant to look like a flagman to drivers. While many are still preserved at railroad museums, the last normally operating Wigwag was removed in March 2021 from a rural crossing in Delhi, CO.
https://en.wikipedia.org/wiki/Wigwag_(railroad)# @NeedaHand---Igotu for the audio
