The Robots’ vanguard of driverless cars have double the crash rate of regular cars. They are facing a serious flaw in their otherwise perfect system: Humans.

Keith Naughton writing for Bloomberg

Driverless vehicles have never been at fault, the study found: They’re usually hit from behind in slow-speed crashes by inattentive or aggressive humans unaccustomed to machine motorists that always follow the rules and proceed with caution.

This will not be a problem once the “flaw” is completely eliminated.