Saw sometime in the last week (Telegraph or Guardian prob) that Tesla cars have been placed under some restrictions in the USA, as its been found they cannot 'see' adequately in poor weather conditions as they are entirely camera dependent. Other companies are apparently incorporating radar or laser beams (as well as camera ?) so can 'see' better through mist, fog, heavy rain etc, thought their 'driving skills' are otherwise less advanced than Tesla.
I cannot imagine even contemplating sending vehicles out onto the road unable to attain vital info in such common conditions.
How did they ever get permission to test on the road at all, with such dangerous limitations?