Precisely. Widespread knowledge would lead to tampering. I was reading a recent insurance case where the driver staged and accident, but the black box indica

Precisely. Widespread knowledge would lead to tampering. I was reading a recent insurance case where the driver staged and accident, but the black box indicated what really happened, and the driver withdrew the claim when presented with the evidence. Widespread data logging including dash cams is going to improve driver behaviour. Even some cyclists are wearing 'dashcams' and this will no doubt improve treatment of all cyclists, even if overall penetration is low.