The Traffic Accident Reconstruction Origin -ARnews-

Re: Coefficient Of Friction

Andrew Rich (74031.1360@compuserve.com)
Mon, 20 May 1996 12:11:36 -0400 (EDT)

Bill

I investigated an accident last month which required measuring the coefficient of friction (COF) on an asphalt shoulder. Since the shoulder normally does not get travelled on it gets a build up of dirt and small grit sized rocks. Although there was not much of this debris it was enough to reduce the COF to a .65 (drag sled). The COF for the travelled portion of the same roadway (measured 1 foot away from the shoulder and in the same direction was .81.
Andrew Rich
74031.1360@compuserve.com

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