The Traffic Accident Reconstruction Origin -ARnews-

Re: Paint's drag factor

Kenneth Reeves (krreeves@cybertron.com)
Fri, 9 May 1997 11:51:11 -0400 (EDT)

For me the only time I use reference drag factors is to get an idea of the
speed. I never put this information on my reports. I prefer to get the drag
at each scene. If this is not possible, I would use absolute minimum (wet ice,
.05)and absolute maximum (wet polished asphalt, .65), this range is so great
it's just about worthless. You did not state the condition of the paint(new,
worn, thick, thin),I would be more inclined to use a reference value (if there
is one)if the paint was new. Still I believe there are too many variables to
depend on it. If I could not get the factor from the scene, I would get my own
range by visiting several (less traveled) parking lots and dragging the parking
lot markings. There's nothing like seeing the numbers for yourself.
Kenneth Reeves

Kenneth Reeves
krreeves@cybertron.com

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