(1) Whether the SA National Roads Agency Ltd (SANRAL) intends building noise abatement walls along the N1 in the vicinity of the Lynnwood Manor area, particularly between Lynburn and Darlington Roads where the current upgrade of the N1 through Pretoria and Meiring Naude Road is being done; if not, why not; if so, what are the relevant details; (2) whether a noise study related to the upgrade of the N1 in this area was conducted; if not, why not; if so, (a) what is the (i) name and (ii) contact details of the person from whom a copy of this study can be obtained and (b) what are the further relevant details?