The Traffic Accident Reconstruction Origin -ARnews-
Intentional Door Opening
David Roberts (email@example.com)
Wed, 6 Sep 2000 09:08:32 -0600 (MDT)
Anyone know of a study of automobile occupants that intentionally open doors while the vehicle is still moving, fall out or jump out and get injured or killed?
Use this form to reply to
Kb. GIF of acceleration data), each investigator was encouraged to look at the evidence and
make his subjective observations about what remained. After the tests were completed, the
investigators returned to the classroom and pooled their observations.
- 1) It was decided that common terminology was important. The actual tire marks left on
the roadway were called "ABS scuff marks."
- 2) On all paved surfaces, ABS scuff marks were lighter and harder to see than a skid mark.
70 Kb Gif image
- 3) Though much less apparent than the skid, every dry surface test left a clearly defined,
measurable ABS scuff mark. The beginning of the mark was well defined. Everyone could
agree on the scuff mark length.
- 4) In every dry ABS test, the tires showed conclusive evidence of the stop.
- a) Tire faces were speckled with longitudinally oriented circumferential marks.
These markings are similar to the striations on a yawing tire face, but shorter and oriented along
the tire axis.180 Kb Gif image
- b) This speckling was more apparent on front tires than rear. 46 Kb Gif image
- 5) ABS scuff marks were of inconstant darkness along their length. There were dark and
light sections within the mark.
- 6) Detail frequently discernable within a skid was usually lost in the ABS scuff mark.
- a) An individual tires scuff length was not apparent within the ABS scuff mark. For
example, front and rear tire marks were difficult to separate.35 Kb Gif
- b) The number of tire ribs was not apparent in the ABS scuff mark.
- 7) Dry surface ABS scuff marks are most easily viewed in the direction of vehicle approach,
at some distance from their beginning, and at a small angle (get away and get low).30 Kb Gif image
- 8) Steering inputs can be apparent within the ABS scuff mark. 35 Kb
- 9) ABS scuff marks are short-lived evidence. Of the seven tests done on very lightly
traveled paved surfaces, only two were measurable 24 hours later.
- 10) When the vehicles were viewed in their rest locations, the ABS scuff marks could be
correlated with a particular stopping event.
- 11) The one wet test attempted was much more difficult to interpret for tire face
speckling, and scuff mark length.30 Kb Gif image 72 Kb Gif image
An accident involving an ABS equipped vehicle calls for a change in the way the scene is
processed. In the past, evidence of hard braking (skid marks) were usually obvious and could be
treated well down the priority list as long term evidence. The same driver action on an ABS
equipped vehicle leaves evidence that is subtle and short lived.
The on scene procedure suggested by the group was to first check the front tires for the telltale
speckling. These marks should be obvious, and will guide the investigator to look for more. The
search for the ABS scuff mark should be made as soon as possible after the collision. Methods
for preserving and identifying this evidence include good lighting, low viewpoint, and limiting
roadway use in the area of the suspected scuff mark.
In the past, an understanding of driver action and vehicle movement was frequently based
upon skid mark evidence. The tests done by this group indicate that with a bit of effort, the same
information is also available from an ABS scuff mark.
Note: A 5 minute Law Enforcement training video is available for $25.
Palm Beach County Sheriff's Office
Vehicle Homicide Investigations Unit
3228 Gun Club Road
West Palm Beach, FL. 33406
45 Kb gif- ABS scuff on S-1 Asphalt
- Files with *.prn extensions require a g-Analyst to view the data graphically. When viewed
g-Analyst, each line reads g fore aft, g left right, and a marker (-1=EOF). Each line is data for
- Files with a *.txt extension can be viewed without software support.
- Test numbers refer to the table above (eg: abs03 was on surface 3).
42 Kb gif- Skid on S-1 Asphalt
41 Kb gif- ABS scuff on dry Genite
44 Kb gif- Skid on dry Genite
58 Kb gif- Skid and ABS scuff on wet Genite
77 Kb gif- Skid and ABS scuff on old S-1
46 Kb gif- ABS scuff on Compacted Rock
56 Kb gif- Skid on Compacted Rock
Concrete old dry - no photos available
78 Kb gif- Skid and ABS scuff on dry Grass
54 Kb gif- ABS scuff on old FC-2 Asphalt
58 Kb gif- Skid on old FC-2 Asphalt
There was no test #9
84 Kb gif- ABS scuff on new S-1 Asphalt
84 Kb gif- Skid on new S-1 Asphalt
Gulfstream Technical Accident Investigator Contributors
Florida Highway Patrol: Inv. John Cataldo, Inv Scott Ratliff
Delray Beach Police Dept: Ofc Richard Jacobson, Ofc Robert Bradley, Ofc Robert
Jupiter Police Dept: Sgt. Sam Miller, Ofc David Schultz
Martin County Sheriffs Office: Sgt Bob Wright, Sgt Steele Ritter, D/S Ray
Palm Beach County Sheriffs Office: Sgt Kerry Fleming, Sgt Dave Johnson, Inv. Bill
Wright, Inv. Sal D'Alessandro, Inv. John Prieschl, Inv. Russ Pruitt, Inv. Larry Colagiovanni, Inv.
Dave Rander, Inv. Al Steinmetz, Inv. Bob Brown
Palm Beach County State Attorneys Office: Ellen Roberts
Palm Beach County Engineering and Public Works: Tanya McConnell PE
Palm Beach Police Dept: Ofc Ron Frick, Ofc Kurt Burfield, Ofc Richard Howe
Royal Palm Beach Police Dept: Ofc Roger Shoeman
Zook Moore & Associates: Richard Ryabik PE