This working paper reviews the various points, questions and additional work raised with regard to the earlier working papers on the F4 (Mays Hill - Prospect). Particular attention is paid to the traffic effects of the Prospect Arterial and desirability of an F4 interchange on Greystanes Road. The modelling work for future traffic prediction has been carried out by the Strategic Planning section of the Department of Main Roads following discussions with the Consultants as to the various assumptions involved. It is considered that the forecast flows are the best estimate of future traffic volumes that can currently be made, however it should be recognised that forecasting does entail a degree of uncertainty. This paper should be read in that light.