Ideally, there would just be more trains and other non-car based conveyances broadly and then some sort of ride share specifically.
In that case, I'd imagine fully autonomous cars would be better because they'd be built for safety and functionality, not advertising it as some 1000HP super car for profit and excess. They'd also be used for trips between destinations and transit hubs so I imagine the speeds would be much slower as well, which would make them inherently safer.
Ideally, there would just be more trains and other non-car based conveyances broadly and then some sort of ride share specifically.
In that case, I'd imagine fully autonomous cars would be better because they'd be built for safety and functionality, not advertising it as some 1000HP super car for profit and excess. They'd also be used for trips between destinations and transit hubs so I imagine the speeds would be much slower as well, which would make them inherently safer.