Why Waymo is having a hard time time stopping for school buses 

For years, Alphabet-owned Waymo has tried to set itself apart from other self-driving startups by emphasizing a culture of caution and safety. Now, just ahead of major planned rollouts across the country, it is facing a recurring failure in one of the most sensitive places imaginable: school zones.

In December, the National Highway Traffic Safety Administration (NHTSA) opened an investigation into Waymo after Austin's largest school district reported at least 19 incidents where the company's...