NHTSA Upgrades Tesla Autopilot Probe Into Emergency-Scene Crashes

U.S. auto-safety regulators have escalated their investigation into emergency-scene crashes involving Tesla Autopilot, a critical step for determining whether to order a safety recall.

The National Highway Traffic Safety Administration said in a notice published Thursday that it was expanding a probe begun last August into a series of crashes in which Tesla vehicles using Autopilot struck first-responder vehicles stopped for roadway emergencies.