You act as if self driving cars are independent of infrastructure. These cars need roads. And if these cars are your solution to mass transit, far more will be on the road, requiring more upkeep. Roads are huge money sinks.

You seem to think self driving cars are magnificent devices that just glide over roads and don't need bridges or tunnels. For some reason, we never include these costs with cars when compared to mass transit. That is simply unfair.

I'm not against self driving cars by any means. But people misrepresent them all the time.