Another HN thread[1] revealed that the permit not only costs $150, but also mandates that Uber report accidents. (And other stuff?)
https://www.google.com/selfdrivingcar/reports/
Internet archive snapshot:
https://web-beta.archive.org/web/20161011014050/https://www....
Sample report (PDF) https://web-beta.archive.org/web/20161213211933/http://stati...
I remember only a few months ago folks were holding up Google as the model for SDC transparency.[2] How times change!
[1] https://www.dmv.ca.gov/portal/dmv/detail/vr/autonomous/auton...
Google's reports will likely be transferred to waymo.com site soon enough, and new ones will appear in due time.