I am not sure free public transport will make such a big difference. It would probably make some people commute by train instead of driving where that's possible because of cost. On the other hand there is also a push to switch to EV cars nationally so what would impact emissions the most is not clear to me.

This not just the North by the way. Most of the country drives with the only public transport being very impractical buses. Really this is the same in many European countries as well.