Shared Flashcard Set


Unit 10-4
Traffic Crash Investigation

Additional Law Flashcards




#1 – List a peace officer’s priorities in protecting the scene of a collision.
1. The first priority is to protect the crash victims and the first responders
2. Check for injuries
3. Protect the involved vehicles and other evidence at the collision scene
#2 – Recognize when a situation is classified as a motor vehicle traffic accident.
1. The incident includes one or more occurrences of injury or damage
2. At least one occurrence of injury or damage was not the direct result of cataclysm
3. The incident involved one or more motor vehicles
4. At least one motor vehicle was in-transport
5. The incident was an unstabilized situation
6. The unstabilized situation originated on a trafficway or the injury or the damage occurred on a trafficway
7. If the incident involved a railway train in-transport, a motor vehicle was involved prior to any injury or damage involving the train
8. Neither an aircraft in-transport nor a watercraft in-transport was involved in the incident
9. If all of these conditions are met, and the property damage is over $1,000, the officer will need to complete an OH-1
#3 – Explain the sequence of events in a traffic collision.
1. Encroachment – entering or intruding into the rightful path or area of another traffic unit
2. Point of possible perception – place and time at which the hazard could have been perceived by a normal person; precedes actual perception and is the beginning of perception delay
3. Point of perception – location and time where and when the person recognized the hazard
4. Evasive action – action or combination of actions taken, such as steering or braking, to avoid a collision or other hazardous situations; includes the results of an initial evasive action such as braking and skidding or slowing
5. Point of no escape – the place and time after or beyond which the crash cannot be prevented by a particular traffic unit
6. First harmful event – first occurrence of injury or damage in the collision
7. Maximum engagement – the greatest penetration of one body, such as a vehicle, by another during collision; instant of greatest force between objects in collision; the time and place of this occurrence and the position of the bodies with respect to each other at this instant
8. Disengagement – separation of traffic units or disengagement of a traffic unit and another object after maximum engagement
9. Final rest – location where a traffic unit comes to rest after a collision; in determining final rest, investigators should find out whether the vehicle stopped at the position at which it was found, or if it was driven/moved to that position after the collision
(Work backwards from 9)
#4 – Describe the difference between contact and induced damage.
• Contact Damage – caused by direct contact with some object which is not a part of the vehicle
• Induced Damage – is when part of the vehicle is displaced (due to the contact but wasn’t hit itself, due to force of contact damage, often around the contact damage)
#5 – List what evidence should be documented with photographs at a traffic collision.
• Sequence of events
• All damage and parts
• Approach to collision scene
• Surface marks on road
• Area of impact
• Final rest
• Evidence from scene
• Vehicle damage
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