Is there a tire friction variation in cooler temperatures?

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brian
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Joined: Tue Jul 14, 2009 10:52 am

Is there a tire friction variation in cooler temperatures?

Post by brian »

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Q: Is there a tire friction variation in cooler temperatures?
A: Studies have demonstrated that the coefficient of friction can vary with the temperature with the lowest values at or around freezing. See
tempvariation.gif
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Other items which may occur in winter driving conditions are “Black ice” and “wet/icy roadway conditions”. However these conditions still provide friction. The average coefficient of friction for “black ice” is approximately 0.2 to 0.4. The average coefficient of friction for wet and glare ice is approximately 0.2 to 0.6 [1,2,3]. The average coefficient of friction for areas of the roadway which did not have water/ice accumulation was approximately between 0.40 to 0.70. A vehicle passing over a wet/icy area and/or “black ice” would react to the change in friction properties only if the vehicle were either braking or steering in such a manner that the vehicle required friction greater than the 0.2 to 0.4 range.
REFERENCES
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snowicecoeff.gif
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