This ROSANV Technical Note is in response to all the inquiries during the Transportation Research Board Annual Meeting that was held in January 1997 in Washington, D.C., and subsequent phone, fax and e-mail inquiries. The primary interest appears to be in the areas of aggregate segregation measurement, texture measurement in general, and texture measurement in combination with noise measurement. Measurement of general surface features and the potential subsequent quantification of surface features also drew much attention.
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Under INDOT’s current friction testing program, the friction is measured annually on interstates but only once every three years on noninterstateroa...
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