U.S. NHTSA has opened a safety investigation into Tesla (NasdaqGS:TSLA) robotaxis and the Cybercab prototype over alleged school zone speeding. The probe focuses on reported incidents where Tesla autonomous vehicles allegedly failed to slow appropriately in active school zones with children present. Regulators are reviewing data from Tesla and complaints from local authorities to assess whether current robotaxi software complies with federal safety rules. The NHTSA investigation into Tesla’s…