OpenTTD AIs and Game Scripts • RailType enum is not documented

The enum AIRail::RailType is not documented, the link below says they only rail type known to game is RAILTYPE_INVALID

https://docs.openttd.org/ai-api/classAI ... bfa868079f

So when we use AIRailTypeList or AIRail.SetCurrentRailType how do we know which rail type to set? all that's available are cryptic numbers returned by AIRailTypeList not coresponding to enum.

I think it's documentation problem because road enum is documented. https://docs.openttd.org/ai-api/classAI ... c12a89e732

Statistics: Posted by GoldMine — 19 Feb 2026 18:34