Enlarge / An independent automotive testing company has evaluated Tesla FSD, and it found some concerning results. (credit: PonyWang/Getty Images) Tesla's controversial "Full Self Driving" is now capable of some quite advanced driving. But that can breed undeserved complacency, according to independent testing. The partially automated driving system exhibited dangerous behavior that required human intervention more than 75 times over the course of more than 1,000 miles (1,600 km) of driving in Southern California, averaging one intervention every 13 miles (21 km). AMCI Testing evaluated FSD builds 12.5.1 and then 12.5.3 across four different environments: city streets, rural two-lane highways, mountain roads, and interstate highways.