The Traffic Accident Reconstruction Origin -ARnews-
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The Traffic Accident Reconstruction Origin -ARnews-
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In days past when speedometer cableing and the gauge were purely mechanical there was likely more of a correlation. Today, with the electro-mechanical aspects of the systems, the digital types are not likely to give you anything. If you can check the cable and gearing in a large magnitude frontal collision and see that it is crushed, or you have some other way to confirm the needle mark, you may have something. I have seen pictorial evidence of back plate analysis.
Anecdotally: One night I was called out to a single vehicle collision into a fixed object. Large mostly head-on crash. I shot the scene and interior of the vehicle. The speedometer needle read zero. The next day at the tow yard I was preparing to profile the damage, and re-shoot the vehicle. I noticed the needle now read (something like) 37 mph. No evidence of another frontal collision. Obviously it meant nothing.
If you think you have such an animal, confirm it independently, somebody may show up with scene pictures that show something else.
Ed
Ed Phillips
edphill@aol.com
For example, to continue this discussion look for a thread titled
Speedometer Locked in Position Following a Collision
If this thread does not exist in the current archive, you can begin another one by using that title.
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