If conditions for a red bug are reached, the game will crash. Orange bugs affect gameplay but do not destroy the game.
Black bugs are minor limitations or quirks.
All bugs on this page, unless otherwise indicated, were documented by Seth C. Triggs, author of this page. 9 June 2001 Game will crash when leaving a train window open when the train is sent to depot. Avoid using signals on curves. If the train is sent anywhere else, there is a high possibility of the locomotive and cars seperating and ruining operation of the entire rail line. You can see if this begins to happen if a carriage appears to be in front of the locomotive.