The NHTSA asks Waymo about its self-driving vehicles illegally passing school buses, including 19 times in Texas this year, as part of a probe opened in October (David Shepardson/Reuters)

David Shepardson / Reuters:
The NHTSA asks Waymo about its self-driving vehicles illegally passing school buses, including 19 times in Texas this year, as part of a probe opened in October  —  A U.S. agency said on Thursday it has asked Waymo to answer more questions after Texas officials said the Alphabet (GOOGL.O) …