[SR2Z]

Who is "we?" The cost to develop self driving cars is not exactly being felt by society at large.

It certainly isn't stopping anyone from improving public transit, but it seems like you believe it's this and not any one of a bajillion actual factors to blame.

[jsrozner]

This is not true. If a king has all the money, then whatever the king wants is what society builds. The use of resources by tech companies to build self-driving cars uses resources for things that might otherwise have gone to some other approach.

Google's use of resources does not occur in a vacuum. Moreover, if cities decided to pass laws that would slowly transition all road infra away from private vehicles to shared public transit, then Google would lobby against that.

For public transit to function well (i.e. competitively with private vehicles), traffic needs to be much reduced (e.g., imagine no traffic lights and no traffic). Google's private cars on the roads do not move us in that direction. There is no doubt that they are technologically impressive, but they do not provide greater utility than investing in shared infrastructure would.