Do you mean active tracks that have passengers or just tracks attached to an object? In 2004, and probably more recent versions, passenger stations can have up to and including 8 active tracks. That is tracks with interactive passengers. You can add many more tracks to the same object if you want but they will not have any passengers. I've made stations with 12 tracks but only 8 were active.What limits the number of tracks in a config file? I can only get four to show and want more.