This brings up a related ops eng problem.
Sometimes it may not be entirely obvious just from where TODA/TORA/ASDA commences. The prudent operator and pilot make appropriate enquiries in cases where the runway is critical. I very nearly got caught out assuming when I ought not to have done so with a runway at a particular Australian airport. In that particular case, the go distances commenced from a point which was, in my opinion, not at all intuitive.
BD tells is like it is in that the usual reason for a longterm displaced threshold is to provide for the obstacle clear surface appropriate to the runway code.