By TOM KRISHER
AP Auto Writer
DETROIT (AP) — A U.S. investigation into Teslas operating on partially automated driving systems that have crashed into parked emergency vehicles has moved a step closer to a recall. The National Highway Traffic Safety Administration says Thursday that it’s upgrading the probe to an engineering analysis, another sign of increased scrutiny of the electric vehicle maker and automated systems that perform at least some driving tasks. An engineering analysis is the final stage of an investigation, and in most cases NHTSA decides within a year if there should be a recall or the probe should be closed. The agency cites reports of 16 crashes into emergency vehicles or vehicles with warning signs, causing 15 injuries and one death.
