Despite the head of the National Transportation Safety Board expressing serious concerns about its safety last week, Tesla has now enabled access to the beta of its “Full Self-Driving” (FSD) program to more Tesla drivers, via a “request” button on Teslas’ dashboard screens. However, before a driver gets access to the software, Tesla will determine their “safety score,” using five criteria that estimate “the likelihood that your driving could result in a future collision,” according to a page on Tesla’s website.