There are a lot of things concerning about these cars driving themselves around the city -- most of which are typically covered in these comment threads -- but

There are a lot of things concerning about these cars driving themselves around the city -- most of which are typically covered in these comment threads -- but here are a few questions that seem relevant to this particular incident: How are police officers trained to deal with these machines? Hopefully its more than "call this number"; are Cruise support lines required by law to be open when their cars are on the streets? What mechanism to police or city officials have to control these machines? Do they have some interface to put the vehicle in neutral and roll it away? Assuming no, why not? What's the right protocol if a car gets a flat tire or is driving around with a door open? Would a driverless car by a different manufacture follow all the same protocols? I'm sure there are clear answers to similar questions -- for example -- for the BART or Muni. It is preposterous that something this significant and potentially dangerous can be deployed on streets in a city with tens of thousands of pedestrians, and no messaging to the public about these details.