At-Scene Traffic Accident Investigation
Length of Seminar: 3 Days
Instructor: Randy W. King
This three (3) day course is designed to provide the on-scene
accident investigator with the knowledge and skills to apply
advanced tactics, techniques procedures and critical factors
in an effective accident investigation.
Evidence From the
Traffic way: In fact, all the engineers from all
the reconstruction firms in this or any other country are
all but important in the face of a lack of on-scene evidence,
properly identified, interpreted and collected by the on-scene
investigator. In this block of instruction, we will look
at evidence that is (or should be) collected from the traffic
Condition of Roadway
Traffic Control Devices
Damage to Fixed Objects
Marks Left on the Roadway
Furrows and Trenches
Gouges and Grooves
Vehicle Parts, Dirt, etc.
Body Tissue and Fluids
Evidence from the
Vehicle: To develop an awareness in the student of
the various forms of physical evidence left in and on vehicles
after a collision; and to establish an awareness of how
to properly locate, interpret, collect and preserve all
the various forms of evidence.
State the importance of post collision vehicle examinations
State the importance of determining pre-collision, during
collision and post collision damage.
List the six major categories of vehicle damage.
List the two major types of vehicle damage and the causes
Coefficient of Friction: To develop an awareness in the student of the concepts and
principles involved in the study of coefficient of friction.
Further, to develop an understanding of the applications
involved in determining coefficient of friction values for
given surfaces. Discuss the concepts and principles involved
in the studies of coefficient of friction. Identify and
apply the equations recognized in the applications of coefficient
of friction in determining values of given surfaces.
Center of Mass Braking
Percentages and Equation Worksheets: To develop an
awareness in the student of the concepts and principles
involved in considering an objects center of mass and a
vehicles braking efficiency and percentages. Further, to
develop an understanding of the applications involved in
determining “field” approximated center of mass
for vehicles and braking percentages.
Grade and Superelevation: To introduce the student to the concepts of grade and superelevation
and their application to speed estimates from skid marks.
Define the terms grade and superelevation as they apply
to roadways and accident scenes. Obtain the proper measurements
and determine grade and superelevation at an accident scene.
Adjust drag factors (Coefficient of Friction) to account
for differences in grade from a test site to an accident
Minimum Speed from
Skids: To develop a working understanding of and
abilities in the applications of minimum speed, and basic
time and distance equations. Identify the equations required
to solve minimum speed, and basic time and distance problems.
Properly list the application and steps involved in the
process of problem solving for minimum speed and basic time
and distance problems. Determine vehicles minimum estimated
speeds, time, and distance considerations using identified