> Without significantly reworking current infrastructure the challenges presented by city driving are too fuzzy to guarantee safety. But, there's no guarantee

> Without significantly reworking current infrastructure the challenges presented by city driving are too fuzzy to guarantee safety. But, there's no guarantee of safety now. Human drivers are fallible and fail all the time. A guarantee of safety is a crazy metric to require before we can allow autonomous vehicles. A better metric is: "before the vehicle is more safe than the median human driver". Once it hits that level of safety, it should be in the streets.