NHTSA sends Tesla a letter asking for detailed information on how Autopilot detects and responds to parked emergency vehicles as part of a wider investigation (Tom Krisher/Associated Press)

Tom Krisher / Associated Press:
NHTSA sends Tesla a letter asking for detailed information on how Autopilot detects and responds to parked emergency vehicles as part of a wider investigation  —  DETROIT (AP) — The U.S. government’s highway safety agency wants detailed information on how Tesla’s Autopilot system detects …