Exactly what I started out looking for.
Then I found ecomodder.com and instead of data logging the project became fuel economy.
Two cameras are a must, side shouldn't be an issue as the blanks are easily filled in from the rear view and front view cameras.
Then you have car data such as brakes, indicators, power steering switch, throttle position, speed, GPS position.
Log all these along with video from front and rear, and you have plenty of data to show what's happened.
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