Event Data Recorder

Event data recorder or EDR, sometimes referred to informally as an automotive "black box," is a device installed in some automobiles, trucks, and commercial vehicles to record information related to vehicle performance, crashes, or accidents. In the USA, EDRs must meet federal standards per the U.S. Code of Federal Regulations. Information from these devices can be collected after a crash and analyzed to help determine what the vehicles were doing before, during and after the crash or event. An event data recorder (EDR), similar to an accident data recorder (ADR) sometimes referred to informally as an automotive "black box" (by analogy with the common nickname for flight recorders), is a device installed in some automobiles to record information related to vehicle crashes or accidents. In the USA EDRs must meet federal standards, as described within the U.S. Code of Federal Regulations.The black box of in-vehicle data recorders terms are larger as they can refer to EDR or to Journey data recorders such as Digital tachograph in Europe or Electronic logging device in the USA.In modern diesel trucks, EDRs are triggered by electronically sensed problems in the engine (often called faults), or a sudden change in wheel speed. One or more of these conditions may occur because of an accident. Information from these devices can be collected after a crash and analyzed to help determine what the vehicles were doing before, during and after the crash or event. The term generally refers to a simple, tamper-proof, read-write memory device.