Did the report also state the CO2 reductions by changing modes?

Why? It is a nice thing to consider, apparently, but not to help with final decisions.
Do you really think that the current government will make a decision based on this aspect?
I can't remember the last time a government decision has been based on CO2 benefits, let alone in regard to triple bottom line outcomes?
It is always $$$$$$$.
If a project proceeds due to the cost:benefit or ROI then they will have marketing spin about CO2 benefits.
Our country is not at that level of maturity yet. It might do when my generation (Gen X) and above, shuffle off this mortal coil.
When millennials finally become CEOs in companies, Departmental Secretaries (or DGs in states) or Ministers in governments, then we may finally see decision making that is truly based on triple bottom line assessment. Sadly I won't be around to see it.
It will continue to be purely reporting and lip service, but not a critical decision point. It will continue to be about $$$$.