I'd like to propose the following: public-private ride share. In short, US Federal Gov't buys or finances the development of ride-sharing software and licenses it to cities. Cities act as Uber does now, skimming a (much smaller) percentage of their revenue as a tax, adjusting the variables in favor of local interests (e.g. incentivizing carpooling or service in lower-income areas), and studying the ways that ride sharing can complement existing transit options.

I know that's a socialist longshot in capitalist America, but I really think that going forward the government is going to have to take a larger stake in tech in order to avoid the types of conflicts we've been seeing between private companies and public interests.