Brake initialization is a non-prototypical shortcut for players in a hurry or in case of problems, in particular due to the fact that brakes don't release completely because .eng parameters working in MSTS don't work in OR, which uses them more completely. (Moreover it is used internally by OR, but this is not the issue here.)
Driving a train with such .eng parameters under OR is a pain, because to release brakes completely you have to stop the train and then you can enter your initialization command. Needing to stop the train to release brakes is even more non-prototypical.
Therefore I suggest that keystroke-commanded brake initialization be possible also at speed not equal to 0. I'm quite sure this change would be hailed by many OR players.
Here's the simple patch

Number of downloads: 212
I hope that this patch is accepted and that I can commit it.