(1) Why, in the light of the Government’s decision to put the e-tolling system into operation by 26 November 2012, are the overhead tolling structures being erected over the main freeways and not at the off- and on-ramps so that the exact distance travelled by vehicles can be measured; (2) how will the e-tolling system function in practice to establish the volume of a vehicle in order to determine its correct class tariff; (3) why should the e-disk system be put into operation at all in light of the fact that the e-tolling system will also able to read vehicle licence numbers, rendering the use of an e-disk system superfluous?