I've said this before...

There are serious things that can be done that reduce cost and CO2 ... Namely move ALL interstate heavy road transport onto Rail!!
If you use Rail for the long haul the effect is (door to door - i.e including local handling at each end) is 20% of the fuel usage!!

Rail even costs less, around 15% less Sydney to Melbourne and 40% less Sydney to Perth - only vested interests are keeping heavy road transport alive.

This would also mean less road maintenance costs, less drugged up truckies etc.

IF they were serious this is the sort of action that makes a substantive difference.