The rta nsw have there web page up and running , to comment on speed limits and speed limit signs in NSW
So get on there and have your whinge.

They have all ready put the Newell hwy back up to 110 klmph

https://www.saferroadsnsw.com.au/HaveYourSay.aspx

I have just had my rant about the 60k zone along the Old road
it should be 80 k which will actually stop all you guys from speeding 

Looks like that web site will be a permanent fixture.
And you can have a whinge about more than one road.

Oh and it is open to anyone, so any of you poor unfortunates from the other states can get on and have your say.