Palacios Accident Reconstruction now offers Crash Data Retrieval (CDR) services. CDR relies upon an instrument installed in most passenger cars, SUVs, and trucks called an event data recorder (EDR). An EDR is a component of the vehicle's airbag control module, and can be configured to store information such as speed, brake use, or restraint system performance when a vehicle is involved in a crash event. The EDR function is used to help determine what the vehicles were doing before, during and after a crash event.