FrankDrebin
Moderator
Haven't heard about 'black boxes' in cars? They record the car's performance factors (speed, braking, seatbelt use, etc.) on a continuous loop. If you have a wreck, the black box will give up all of the secrets about how fast you were driving, when and how hard you put on the brakes, and so forth. Insurance companies love them because they take all of the uncertainty out of what happened in a wreck.
Yes, they're wonderful in helping to determine who was at fault in a fatal crash. I can see why generally 50% or so of drivers involved in fatal crashes would not like them though. Personally, I don't care if the government has the authority, with a search warrant, to know how fast I was going, or what my brakes were doing, for the 5 seconds before my car last stopped.
But actually, they don't come CLOSE to taking all the uncertainty out of what happened in a wreck. They just tell you what the brakes and engine, etc. were doing in the 5 or so seconds preceding the crash.