Why do you keep saying "accident"? The vast majority of crashes occur due to choices in physical and regulatory design. You don't need new technology to dramatically reduce fatalities. However, the new technology is welcome, but does need a thoughtful regulatory framework. E.g. existing land use regulations kill people (in addition to other negative externalities) on roads because in most places mobility is impossible without driving. Self driving regulations should take heed to the mistakes of generations past to encourage more pro-social outcomes.