Event data recorder

When a traffic crash reconstructionist wanted to know the speed of a car in the seconds before it crashed into the side of a school bus, he found that information, and more, in the car's Event Data Recorder (EDR), a feature quickly becoming standard on all cars. The recorder, a four-inch square metal box, is currently installed in most recent GM vehicles and select 2000 and later Ford vehicles.

References

• http://www.harristechnical.com/cdr.htm