I have always wondered how the suffixes of railway platforms are determined. With the suffix, I mean the part after the track number. For example, platform 8a, its suffix is (a).
I've heard that, in the Netherlands, the platform closest to Amsterdam is given the (a) suffix. Except for station Roosendaal, here the (a) suffix is given to the platform closest to Antwerp. Could somebody confirm this?
I'd like to hear how this is determined in the rest of the world, if at all.