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RE: [infoguys-list] Skidmark Speed Nomograph

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  • Kauffman, Thomas T PET
    Danny; Thanks for the information, I appreciate your help! Sincerely, Thomas
    Message 1 of 6 , Feb 8, 2001
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      Danny;

      Thanks for the information, I appreciate your help!

      Sincerely,

      Thomas

      > -----Original Message-----
      > From: Danny Horton [SMTP:dhorton@...]
      > Sent: Thursday, February 08, 2001 11:35 AM
      > To: infoguys-list@yahoogroups.com
      > Subject: Re: [infoguys-list] Skidmark Speed Nomograph
      >
      > Thomas,
      >
      > I assume you are using the Northwestern or IPTM templates. I am not
      > familiar with any other, but I guess they will be the same.
      >
      > If you take a straight edge and lay it across the information you have,
      > such as distance and drag factor, you can determine the speed, and feet
      > per second. If you don't know the drag factor, do what most who use the
      > template do and use the average. The average for a well traveled, dry
      > asphalt will be .70. Some investigators use .65, so use both to get an
      > idea. .55 will be an average for wet asphalt. .80 will be an average for
      > concrete, and sometimes new asphalt.
      >
      > Conversely, if you have the drag factor and the speed and you want the
      > distance traveled then line those figures up and read up the scale. The
      > template is not that accurate so please don't expect to testify from the
      > information. It is a good tool to get an idea, and a very close idea of
      > the speed and that is all. It will help an investigator determine, within
      > a ball park, what the speed is when they are measuring skidmarks.
      > Measuring skidmarks is another story.
      >
      > Good luck. Let me know if I can help.
      >
      > Danny Horton, CLI, MCI, CFC
      > Post Office Box 8
      > Iuka, Mississippi 38852
      >
      > Office: 662-424-9524
      > Fax: 662-423-1137
      > Pager: 877-215-7117
      >
      > email: dhorton@...
      > <mailto:dhorton@...>
      > web: <http://www.legalinvestigator.com>
      >
      > ----- Original Message -----
      > From: Thomas.S.Kauffman@...
      > <mailto:Thomas.S.Kauffman@...>
      > To: infoguys-list@yahoogroups.com
      > <mailto:infoguys-list@yahoogroups.com>
      > Sent: Wednesday, February 07, 2001 2:38 PM
      > Subject: [infoguys-list] Skidmark Speed Nomograph
      >
      > Can someone give a small example of how the Skidmark Speed Nomograph
      >
      > is used/applied. I?m preparing the materials for a drivers course
      > for our employees (ambulance designated driver) and I?m not sure I
      > have figured out how to use the skidmark speed nomograph (FEMA
      > Emergency Vehicle Driver Training).
      >
      > Does distance tell me how far the vehicle will skid at a given
      > speed;
      > or the speed according to the length of the skidmarks?
      >
      > Thanks for the Help!!
      >
      > Thomas
      >
      >
      >
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