The subreddit mod suggests at least some of these factors are considered: "Wheel torque, accelerator push percentages, G forces, don't cut in and out of lanes, use your signal, don't run lights or stop signs." https://www.reddit.com/r/teslamotor...ase_fsd_beta_to_early_access_program/g9gtcja/It's of interest to me how they determine who is "safe and careful".