Waymo, the autonomous driving technology company, is mapping streets across Cincinnati and Northern Kentucky as it gathers information about the region's roadways.
Cameras and sensors on the vehicles collect information used to build detailed maps that can help the company's autonomous driving technology navigate roads.
A July study from the Insurance Institute for Highway Safety compared Waymo's driverless vehicles with human drivers in San Francisco, Phoenix, Los Angeles and Austin.
Researchers found Waymo's driverless vehicles had a 68% lower rate of involvement in police-reportable crashes per mile than human drivers in the same cities and years studied.
The study analyzed about 50 million miles traveled by Waymo vehicles in driverless operation.