Subsidizing personal vehicles sounds completely insane and irresponsible to me.
The problem is that everyone ends up with their own vehicle and this gridlocks any road in/out of a city. Which ~big city in the world does not have trafic problems? And what is the average passenger count in those cars. One bus can replace MANY cars. But for some reason i cannot comprehend taking the bus or train seems oppressive to some people. I get this is not an option everywhere but where i live it most definatly is and people still complain about the tolls drivers have to pay to commute into the city and refuse to take the bus/train.