(1) Whether SA National Roads Agency Ltd (Sanral) has conducted a study to determine the effect that the location of the Marianhill toll plaza on the N3 road has on truck volumes on the M13 road; if not, why not; if so, what are the relevant details; (2) whether Sanral will consider moving the existing toll plaza closer to Hammarsdale in order to prevent the diversion of trucks onto the M13 road; if so, what are the relevant details; if not, (3) whether he will launch any other initiative to minimise the diversion of trucks onto the M13 road; if not, why not; if so, what are the relevant details?