Tesla's robotaxi ambitions in California face regulatory hurdles as the CPUC clarifies that autonomous vehicle testing and public transportation are prohibited without a human driver. While Tesla holds a permit for a private car service with drivers,

Tesla has told California it would expand operations of a chartered transportation service in the Bay Area, a state regulator said on Friday.

The California Public Utilities Commission said Friday it received a notification from CEO Elon Musk's automaker about the service, which would have human drivers.