That was the idea with Google's little bubble car. It was supposed to have a top speed around 25mph and cruise around retirement communities. That seemed like a feasible goal. But it cost too much to make as a product. The LIDAR units alone would have put it over $100K.[1]

Voyage.auto [2] claims to be deploying such cars now. Or rather, their web site contains announcements from late 2018 that they were doing so. Later information seems to be lacking. It's a basically good idea, but they claim an on-site staff of 5 for three cars, so they are nowhere near this making financial sense.

A real problem with self-driving cars is the false-alarm rate for emergency braking. If you're conservative about crash prevention, every once in a while the vehicle is going to detect something it doesn't identify as safe and will brake hard. That's why Uber turned off automatic braking in their cars - "to reduce potential for erratic behavior."[3] False-alarm braking, or even strong braking conservative by human standards, limits customer acceptance.

[1] https://arstechnica.com/cars/2015/05/googles-quirky-self-dri...

[2] https://voyage.auto/

[2] https://www.latimes.com/business/autos/la-fi-uber-arizona-nt...