Tesla has been working on enhancing its Autopilot self-driving feature, and the upcoming update might make its cars even safer than human-driven vehicles. The update will cap the top speed to the preset speed limit when the vehicle's Autosteer function is used, TechCrunch reported citing sources. Autosteer is a Tesla feature that controls the wheel and maintains the car's lane. If speed limits could be imposed using the updated software, it would make vehicles less prone to accidents. A Purdue University study in 2008 found that most drivers on U.S. roads don't follow speed limits, which is one of the major causes of accidents.