What key technologies contributed the most to the rise of safety in autonomous vehicles in the past ten years?

There has been an influx in the number of autonomous vehicles that are on the road. These vehicles have become very popular because of their improved accuracy and ability to drive through most conditions without human correction. To further improve these vehicles, manufacturers need to focus their finances and resources on factors that make an impact. The lack of information in this space has created the goal for this research study: to determine the key technologies that have contributed the most to the increase in the safety of autonomous vehicles in the past ten years.