It is simple and you may not believe me but: The Brake-Mode is specified by the timetable. Thats why setting the Brakemode in TSW is a little bit hard. This is how it is regulated in real life: Lets say we have a 2000t Train. The Timetable specifies P. We then have to check for a certain set of criteria: - Net-Weight of Car-Train. In our Case the Train weighs 2000t. that means its far heavier that 1200t so we need to set the loco and the first five cars to G. - Are all Cars loaded or weigh more than 32t? if not the Train needs to run completely in G 1601t to 2500t: Each Vehicle must weigh at least 32t. 2501t to 4000t: Each Vehicle must weigh at least 40t. Is the Train equipped with UIC-AK Coupling? If yes, the train can run completely in P, regardless of the weight. We then need to Calculate the BrH: First of all, we need to deduct 25% of the Brake-Weight at every Vehicle that was set to G. We then need to Check our Lenght of the Car-Train: In the case of freight trains for which braking position P is required, at every Vehicle in braking mode P certain values of the brake-weight are deducted if the train exceeds certain lengths: - deduct 5% if your train measures 501m to 600m - deduct 10% if your train measures 601m to 700m - deduct 19% if your Train measures 701m to 815m Furthermore, for every vehicle in braking position G (in addition to the 25% already deducted) a further 5% must be deducted from the braked weight if the train exceeds a length of 701m If all those things are considered, you can determine the PZB mode with the resulting BrH. It may sound strange, but it is possible, for example, to run a train in braking mode P even though it has less than or close to 60 Brh.