I've always thought that vehicles should be required to have sealed black boxes and cameras forward and rear. Or that those who do have their cars so-equipped should get a discount on their insurance. The recording would be a manageable duration, maybe a 30-minute rolling window that gets overwritten, unless the air bags get deployed, in which case the video file is automatically archived for legal purposes. In court, the black boxes of the vehicles involved would be unsealed by law enforcement and the contents reviewed to see just what actually happened, what speeds were involved, if and when the brakes were applied, etc.

The technology might be useful for cyclists as well, with the video getting automatically archived when the accelerometer exceeds 300g or something...

L.