These slow electric busses are all over the world on serious trials with real passengers. For examples: https://www.theguardian.com/technology/2016/aug/18/self

These slow electric busses are all over the world on serious trials with real passengers. For examples: https://www.theguardian.com/technology/2016/aug/18/self-driving-buses-helsinki https://www.theguardian.com/technology/2016/aug/18/self-driv... But they have also been used in DC, Vegas, Perth, the Netherlands and other places. It might not be a total replacement for cars but they are self-driving vehicles that are moving passengers now.