Reply to "When do your ring your locomotive's bell?"

Whenver!

But I tend to ring the bell when I'm moving slowly through a tight area since my operations are yard focused and in the steel industry. That's how one of the guys ran the train in real life in the foundry. He would ring the bell when coming into a building and when moving the locomotive inside the building. Not everyone did but I thought it was good policy to have the bell going when you're in a congested area so I follow suit on my layout.