(1)Has the commissioning process with Siemens for the Gauteng Nerve Centre (GNC) rail signalling system been completed; if not, (a) why not and (b) what has been the cost of noncompletion to the GNC; if so, when; (2)is the GNC fully functional and connected in line with the intended design; if not, what are the reasons; (3) has the full staff component necessary to operate the GNC been trained; if not, (a) why not and (b) by what date will this happen; (4) whether the full extent of the rail network of the Passenger Rail Agency of SA (Prasa) is currently monitored from the GNC in accordance with the initial plans; if not, (a) why not and (b)(i) what measures have been put in place to extend the service to cover the full extent of the Prasa rail network and (ii) at what cost?