The issue with these is that they don't of course necessarily confirm safe driving.
They can spot some types of unsafe driving. Frequent high rates of acceleration and deceleration for example.
This is true, as well as breaking speed limits. They will become more effective once smarter and linked to other inputs such as cameras for obstacles, weather conditions, driver condition etc.
@jellybaby started
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The issue with these is that they don't of course necessarily confirm safe driving.