im not sure what the rta's processes are... but from memory in vic i think u have to pay a ghastly application fee just for vicroads to investigate the matter, and if they decide that its not their fault, u dont get ur application fee back! (its something like that i think)
plus given the way the sydney roads are (victoria road and parramatta road are my favourites for a bumpy ride lol), i dont know how much luck u will have