Event data recorder

An Event data recorders (EDR, or black box) is an electronic sensor that records specific characteristics of an automobile moments before and during a collision. As of 2014, they can be found on 90% of all new cars and light trucks. For those with EDR installed, NHTSA requires a minimum of 15 data points to be recorded by all EDR (including speed, steering, braking, acceleration, seatbelt use, and force of impact (of a crash) and whether airbags deployed), though, additional and more detailed information may also be recorded typically up to 5 seconds before a crash. Officers should note that access to these data are protected by state law and often require a search warrant or owner’s consent.

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