“The results show that, on a limited scale, these driverless cars are safer than human drivers — who can be impaired or drowsy or suffer lapses in attention.” "That makes it impossible to know how common it is for their vehicles to crash," IIHS says. Waymo vehicles were involved in 85% fewer single-vehicle crashes and 81% fewer injury crashes per vehicle miles traveled than humans. Zoox Parked Zoox“Those are encouraging signs for the future of driverless vehicles,” says Eric Teoh, IIHS director of statistical services and lead author of the study. But there are still many, many more human miles in the equation compared to those of driverless cars.