Crash Data Retrieval

TARAS uses Bosch Crash Data Retrieval (CDR) Software and Hardware products that support the retrieval of crash data from Airbag Control Modules (ACM), Roll-over Sensors (ROS) and Powertrain Control Modules (PCM) installed in many late model domestic and some foreign vehicles. CDR data can make the difference in resolving key issues of accident causation.

CDR information is often crucial to the investigation of collisions. Antilock brake systems prevent locked wheel skid marks (a traditional source of evidence of speed and driver reaction) from appearing on the road. Many vehicle electronic components record wheel speed, brake application, throttle position, and engine RPM information for five or more seconds prior to collision. In addition, CDR data will record whether the driver was wearing his seatbelt at the time of the crash.

The use of EDR data is not restricted to high speed collisions. For instance, event data from a car that rear-ended a stationary van in a parking lot revealed that both vehicles experienced a speed change of 2.4 mph during the collision. Because the speed change experienced during a collision is an indicator of impact severity, this finding was useful in assessing the likelihood of soft tissue injury to the van occupants.

The use of electronic event data is becoming more commonplace in courts across North America. The data has been accepted in cases in at least 17 states, in several federal cases, and by at least three appellate courts. The software manufacturer has conducted a large number of tests to measure the accuracy of the data recorded by EDRs. The results of these tests, published in several papers by the Society of Automotive Engineers, have been employed to support the use of recorded event data in analyzing real-life crashes and have been used in successful Frye and Daubert hearings. Mr. Painter has provided expert testimony regarding the imaging and interpretation of CDR data.