> furthers the gap between public transit and cars.

It doesn't have to. If Waymo (and other autonomous taxis) were clever -- and maybe they are -- they would spend their lobbing money on high speed trains and then capture the "last mile" market.

Some years ago I was riding with a friend north on the 15 (San Diego, after a decade+ absences) and my noticeable wtf face prompted a "yeah, they built a freeway in the center of the freeway". It's an abomination. When I was there, I-15 was generally for the longer drives. My friends that lived in Temecula/North County etc would spend hours of their life driving (or slowly rolling) into SD for school/work/play.

A high speed train would have fit where they put the supplemental freeway. Now there is no more room to expand once they need more capacity; extra trains or cars could be added to a train to solve the same thing and placed along the freeway there is minimal to no neighborhood inconvenience. Then companies like waymo can take people to their final destination.