Maelochs

When tandempower steers clear of eucalyptus ... s/he really gets it. *(No offense intended, I don't know and don't really care about your gender.)

First off, self-driving cars compete with taxis, not buses. And as Tandem notes, people have imagination. There will be everything from guys on tandem electric motorcycles (popular in some countries) and rickshaws to driverless Ubers to minivans of all variety ... wherever there is a niche someone will try to start a business.

If there are people who want a bus from a neighborhood to a part of the city ... some enterprising person will offer a service for a fee. There might be guys in the city who rent electric bikes or Segways or share-a-ride minicars ... and some of the minivans might drop passengers there.

Some people will live in places where a full-sized bus wouldn't be economical but a self-drive minvan might work. or maybe an electric rickshaw with a super-cheap sheet-plastic enclosure---just enough to keep the rain and dust off the passengers, who would still wear weather-appropriate clothes, and walk to and from the pickup and drop-off points.

The reason we see gasoline rickshaws in many cities around the world is that our roads and our laws and our city planning has all revolved around the car since after WWI or so. A four-foot wide electric-pedal rickshaw might take up a whole bike lane ... but there aren't serious bike lanes in enough places. That can change.

If we look at other countries with very different economies ... all kinds of options out there.