“In its first report on its autonomous vehicle operations in Phoenix, Arizona, Waymo said that it was involved in 18 crashes and 29 near-miss collisions…” reports the Verge
The 18 refer to actual crashes where actual contact was made was contacted with another vehicle (or potentially if it has been, or bicyclist). There were no injuries.
The 29 near-misses refer to simulated responses of their AV system; which didn’t actually happen, because the human driver intervened. The vast majority of Miles logged were with a human “safety driver” present.
By the way here’s the story of the kook that caused one of the crashes, he was apparently a disgruntled ex-Waymo driver