sdielectrical,
Have you started a Facebook etc. page(s) and do you have any petitions going.
BMC will respond to the loudest noise --- believe me, I know the area --- and traffic at Katoomba (being nowhere near Katoomba) has virtually nil noise impact on Leura, Katoomba or Blackheath.
Tootle pip!!
PS: And it is absolutely vital during the fire season!!