A .ttb file is a program readable timetable file. It contains information about the timetable for a route. It is designed to be opened in Railway Operation Simulator, however, it can also be opened and edited in ROSTimetableEditor
A .ttb file is a program readable timetable file. It contains information about the timetable for a route. It is designed to be opened in Railway Operation Simulator, however, it can also be opened and edited in ROSTimetableEditor