One aspect of Train Simulator that bugs me is that AI trains can't use their horns. I feel like allowing them to do so would add a bit more immersion into the game. I'm not sure about other countries, but horns and whistles are used quite a lot in the US, and it just seems unnatural for AI trains to be completely silent. I'd like it if an AI train would give the proper horn call out before moving, or when gong through a crossing, or even giving a friendly "Toot Toot!" as you pass by one. I'd like to elaborate further, but for some reason I've been having some serious writers' block on this one. Anyway, what do you guys think?