(1) What steps are being taken by the Passenger Rail Agency of South Africa (Prasa) to curb incidents of railway deaths, particularly with regard to (a) reparing and replacing train fences and walls and (b) cordoning off train tracks; (2) whether any alternative options are currently being investigated by Prasa CEO, Mr Lucky Montana; if not, why not; if so, (3) whether an alternative option has been decided upon; if not, why not; if so, (a) what are the relevant details of this option and (b) when will it be implemented?