DI-9 Manual PDF - Utah Department of Public Safety

First EventDefinition: The first injury or damage-producing event caused by the vehicle (mechanical means)that characterizes the crash type.Example: A vehicle does not run a stop sign. Although at times, the vehicle may have equipmentfailure.This is the first event that took place with regard to the vehicle. Enter the two-digit code in the box,indicating the most appropriate code from list above.Rationale: Needed for uniformity in reported motor vehicle crash statistics, understanding crashcausation, and identifying possible crash avoidance countermeasures. For analytic purposes it maybe desirable to collect and use information about subsequent events, some of which may beharmful.Second EventThis is the second event of the chain of events that took place during the crash. Enter the two-digitcode in the box, indicating the most appropriate code from list above. If there is not a second event,mark 96 (not applicable).Third EventThis is the third event of the chain of events that took place during the crash. Enter the two-digitcode in the box, indicating the most appropriate code from list above. If there is not a third event,mark 96 (not applicable).Fourth EventThis is the fourth event of the chain of events that took place during the crash. Enter the two-digitcode in the box, indicating the most appropriate code from list above. If there is not a fourth event,mark 96 (not applicable).Most Harmful Event for Vehicle(use codes 00, 07 – 69)Definition: Vehicle event that resulted in the most severe injury or, if no injury, the greatestproperty damage involving this motor vehicle.This data item is designed to capture which event was most responsible for the injuries that resultedfrom the crash. This may not necessarily be the first event. For instance, if a vehicle leaves the roadand strikes a tree, then a code of 60 (tree/shrubbery) should be entered here. Striking the tree wasmost responsible for the injuries; likely, no injuries resulted in simply leaving the road. Also, not all34