With all of the talk about self-driving cars, youâd think that they were already on our streets. Well, technically in some states such as California, Nevada and Pennsylvania, automakers and technology vendors are already publicly testing autonomous vehiclesžwith human drivers and engineers onboard. You might have also heard about the Teslaâs driving around town in âAutopilotâ mode where drivers are doing everything but driving. Not all autonomous cars are the same. While engineers are striving for full self-driving mode one…