I' guessing this is sarcasm as most private transport infrastructure is already "free". Roads, bridges, traffic lights, street lights, some car parks, snow clearing, etc...

Even in the US, the majority of education provision is free or subsidised, and 19% of Americans have free or subsidised healthcare.

Social democracies believe that our large, common problems should have common solutions which benefit everyone and society as a whole. That's nothing to do with communism.