There may be speed profiles that are valid for the travel time calculation, but not for the driver's working timetable. The background is that the travel time calculation of the timetable "on the safe side" is expected to be rather slower, but the driver's timetable should allow the highest actually permissible speed so that a train does not go more slowly than necessary due to the driver's timetable. Therefore, if you are not sure whether a slow ride will be necessary (short drive, entry into stub tracks, PZB-influencing), these speed limits should be stated in the calculation of the travel time, but not in the driver's working timetable.

Example: In a railway station equipped with PZB (Indusi) train intersections take place, whereby the first incoming train is subjected to different additional speed limits of the PZB (typically 45/25 km/h after 1000/500 Hz influence and after the intersection stop). These speed limits are to be taken into account in the travel time calculation since they occur as planned. In the driver's timetable, however, they should not be shown, because the driver would otherwise not be able to drive faster even if the influence, for example, in the event of a failure of the train crossing, is not active. For this purpose, a "normal" basic speed profile (that means, without PZB limits) would be created in FBS as well as an additional profile with the PZB limits. For the speed limitation, both profiles are assigned to the train, and only the basic profile for the driver's timetable.

Note: This approach is similar to station speeds in FBS and is partially redundant. For example, you could solve a typical stumped approach, which is to be taken into account in the travel time calculation (speed limitation), but not in the driver's timetable, either via FBS station track speeds or alternative driver's working timetable speed profiles. Especially in the area of railway stations, the user can choose freely which route to take. The driver's timetable speed profiles are generally somewhat more flexible than the FBS station rail speeds.