Accident definition - Answers An accident is a sequin of the events that usually produce unintended
injury death or property damage.
Collision - Answers A collision is the act of coming together with sudden violent force .
Unsafe Acts - Answers Driving while impaired speeding and aggressive driving
Unsafe conditions - Answers Road work in progress, weather related problems such as ice and snow on
the roadway, and dense fog that limits visibility.
Level one of collision investigation - Answers Reporting: basic data collection, and identify and classify.
Level two of collision investigation - Answers On-scene: Urgent data collection, photographs.
Level three of collision investigation - Answers Technical evaluation: delayed data, and additional data
needed. (Scale diagram, damage evaluations, simple speed evaluations, tire and lamp evaluations.
Level 4 of collision investigation - Answers Professional reconstruction
Level 5 of collision investigation - Answers Cause analysis: determine why. Using opinions. Done by
reconstructist.
5 major events of a collision - Answers 1. Point of possible perception
2. Point of actual perception
3. Point of no escape (1.6 sec reaction)
4. First harmful event (PPOI)
5. Point of final rest
Point of impact sub categories - Answers Point of primary impact: (PPOI) the first time the vehicle touch.
Point of Maximum Engagement: the most penetration between the two objects.
Point of Disengagement: is the separation of the two objects.
Component is moved by outside source after impact, the driver moves the vehicle off the roadway: -
Answers Controlled final rest
Component continues to roll slide or flip after the impact no outside source controlling the final rest
position. - Answers Uncontrolled final rest