The National Highway Traffic Safety Administration (NHTSA) is investigating Tesla's partially automated Full Self-Driving (FSD) system amid complaints of road safety violations. In its notice published earlier this week, the NHTSA says it will examine versions of FSD labeled as FSD (Supervised) and FSD (Beta), which are active on about 2.9 million Teslas. At issue are two dangerous behaviors: running red lights and ignoring lane markings. In the first scenario, FSD-enabled cars have run red lights or come to a stop and then continued before the light turns green. In some cases, the system also failed to detect and display the correct traffic signal state in the vehicle interface or provide any warnings. The NHTSA's Office of Defects Investigation (ODI) has logged 18 complaints and one media report about the red-light issue. It had six reports of crashes, four of which have caused injuries. On the second point, FSD cars drive into the wrong lanes when they're unable to accurately as...