(a) What are the details of all road crashes that took place at the Gilloolys interchange in Ekurhuleni in terms of (i) vehicle type and (ii) statistics in each month in each of the past three financial years (details furnished), (b)(i) how is the statistics being used in road (aa) traffic safety and (bb) traffic movement strategies and (ii) what strategies were developed as result thereof (aa) in each of the past three financial years (details furnished) and (bb) since 1 April 2017?