ACTAR Evidence Documentation & Interpretation 2

Question 1

When photographing tire marks at a crash scene, which lighting technique best reveals surface texture and mark depth?

Accepted Answer

Oblique (raking) light from a low angle

Answer

Oblique or raking light cast at a low angle creates shadows that highlight surface texture and reveal the depth and detail of tire marks.

Question 2

Which document best establishes the chain of custody for a physical evidence item collected at a traffic crash scene?

Accepted Answer

A signed evidence log recording each transfer of possession

Answer

A signed evidence log that records every transfer of possession establishes an unbroken chain of custody for physical evidence.

Question 3

In total station surveying of a crash scene, what is the primary advantage over traditional tape-measure methods?

Accepted Answer

It simultaneously measures angle and distance to produce precise 3D coordinates

Answer

A total station simultaneously measures horizontal angle, vertical angle, and slope distance, yielding precise 3D coordinates far faster and more accurately than tape methods.

Question 4

When interpreting a gouge mark in pavement, the deepest portion of the gouge typically indicates what?

Accepted Answer

The point of first vehicle contact with the ground

Answer

The deepest portion of a gouge mark generally corresponds to the point of first, most forceful contact between a vehicle part and the pavement surface.

Question 5

Aerial drone photography at a crash scene is most valuable for which documentation purpose?

Accepted Answer

Providing an overview of scene geometry and spatial relationships

Answer

Aerial drone photography provides a bird's-eye view that effectively documents the overall scene geometry, road layout, and spatial relationships between evidence items.

(ACTAR) Accreditation Commission for Traffic Accident Reconstructionist Practice Test

(ACTAR) Accreditation Commission for Traffic Accident Reconstructionist Practice Test

ACTAR Evidence Documentation & Interpretation 2