The Traffic Accident Reconstruction Origin -ARnews-

Re: Speed estimates from crush

Tim Reynolds (treynold@ncn.com)
Fri, 18 Apr 1997 18:35:42 -0400 (EDT)

Does anyone know the reliability of Crush in determining speeds. Also can you use it in regards to a 90 degree impact with another moving vehicle. Let me further explaine.

A 1986 olds was traveling south, a kenworth semi/trailer was west bound.

The car struck the trailer of the Semi (semi traveling a uniform speed) (35 mph)
The car was in a full breakin skid at the time of collision. The investigator measuered the damage on the car and used Crush to determine the impact speed of the car.

My question is this, can Crush be used in this type of situation with anytype of certainty, It was always my understanding that Crush was not very reliable and had up to a 40 percent error rate.

I've spoke with other people (Police Officers /Private) in the field of Accident Reconstruction and they have never heard of anyone using Crush as described in the above situation. Can anyone provide me with any information on the error rate of crush???

Thank you very much

Sincerely:

Tim Reynolds
Tim Reynolds
treynold@ncn.com

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