Waymo driverless cars were involved in 68 per cent fewer crashes than human drivers over a three-year period across four U.S. cities, according to new data from the U.S. Insurance Institute for Highway Safety.

The research offers some of the strongest evidence yet that driverless vehicles can outperform human drivers on safety.

Study finds Alphabet Inc.-backed Waymo robotaxis have significantly lower crash rates than human drivers in 4 U.S. markets.