Summary:

- The article discusses several incidents involving Waymo's self-driving vehicles in Tempe, Arizona. Waymo is a subsidiary of Alphabet, Google's parent company, and is a leader in the development of autonomous vehicle technology.

- The incidents include a Waymo vehicle being rear-ended by a human driver, a Waymo vehicle making an "unsafe lane change," and a Waymo vehicle being involved in a collision with a motorcycle. These incidents have raised concerns about the safety and reliability of Waymo's self-driving technology.

- The article also mentions that Waymo has been testing its self-driving vehicles in Tempe since 2017 and has had over 20 million miles of autonomous driving experience. However, the recent incidents have prompted calls for increased regulation and oversight of the self-driving vehicle industry.