The Traffic Accident Reconstruction Origin -ARnews-

Re: What do we see when we look at skidmarks?

Michael G. Sunseri (leveerat@ix.netcom.com)
Fri, 28 Jun 1996 23:26:43 -0400 (EDT)

A skid mark on clean concrete consists of the tire rubber that has been machined off of
off the tire by the concrete. On asphalt surfaces some of what you see is smeared
asphalt (caused by heat and pressure)as well as tire rubber that has been
machined off of the tire's surface. If a tire slides across tar expansion
joints the tire may pull some of the tar out onto the surface and that tar
will become part of the mark.
Michael G. Sunseri
leveerat@ix.netcom.com

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