It's less obvious than it sounds, I promise. Here's some east coast adjacent reading for the curious, Erie railroad circa 1920, thanks to my friend Casey for pointing this out: http://www.jon-n-bevliles.net/RAILROAD/Erie_ROTOD/ebor30.html#EngineWhistleSignals Surprisingly, most of the rules translate to the east as well! Visit the channel shop: https://hycetrains.com/store Join my discord: https://discord.gg/hyce Become an ES&D Train Crew Member and get extra perks! https://www.youtube.com/channel/UCHUb_Wty4v2ddZqbxdqOmxA/join