Complex sentence: Platforms 1 and 2 make up the Roma Street Busway Station, while the opposite side of platform 2 is used for long-distance train travel from Brisbane to Sydney by the CountryLink XPT train.
Split into simpler sentences: Platforms 1 and 2 make up the Roma Street Busway Station. Platform 2 is also used for long-distance train travel from Brisbane to Sydney by the CountryLink XPT train.