If Transport Fever crashes you can find information about the crash reason in the file stdout.txt.
Please note: If you start Transport Fever again, it will overwrite any old file and the crash reason is lost.
1 Windows
For Steam Users:
<Drive letter>\<... Steamfolder ...>\userdata\<userid>\446800\local\crash_dump\
GOG-User:
<Drive letter>\Users\<User Folder>\AppData\Roaming\Transport Fever\crash_dump\
2 Linux
Steam Linux
~/.local/share/Steam/userdata/<user-number>/446800/local/crash_dump
GOG Linux
~/.local/share/Transport Fever/crash_dump
3 Mac
Steam Mac
~/Library/Application Support/Steam/userdata/<user-number>/446800/local/crash_dump