What (a) are the full reasons for the recent erection of stop signs on the N12 between the R28 and R558 at Zuurbekom in the Westonaria Local Municipality in Gauteng, (b) traffic impact studies were undertaken (i) to ascertain the necessity for the stop signs and (ii) since the erection of the stop signs, (c) were the results of each of the impact studies in each case and (d) were the costs involved in erecting the stop signs?