Volume 1: The Electronic Data Recorder, or “EDR," documenting vehicle dynamics, speed, breaking and occupant dynamics.
Many automobiles are now equipped with event data recorders, or EDRs, sometimes referred to as “the black box.” The "EDR" is a device installed in a car, 18-wheeler or heavy truck designed to record technical vehicle and occupant information in car crashes. The information recorded is usually for a brief period of time before, during and after a crash (however, data recorders in 18-wheeler tractors often record historical data such as driver hard braking events). For instance, EDRs may record (1) the vehicle dynamics before the crash and system status before the crash, (2) driver inputs, before, during and after the crash, such as breaking, throttle application and acceleration/deceleration, (3) seat belt use or non-use and airbag deployment, and (4) post-crash information such as the activation of an automatic collision notification system.
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