Hello Shimon, Tire friction is typically characterized in terms of SN (Skid Number). A lot of testing work was done during the Œ70s to measure tire characteristics. UMTRI¹s on-line library catalogue (http://www.umtri.umich.edu/library/simple.html) is always a good start in finding such information. The following two documents that I looked at contain data that are likely to be useful for you: (1) Hayes, G. G.; Ivey, D. L. 1975. Texture, skid resistance, and the stability of automobiles in limit maneuvers. Texas Transportation Institute, Highway Safety Research Center, College Station. 13 p. Rose, J. G., ed. Surface Texture Versus Skidding: Measurements, Frictional Aspects, and Safety Features of Tire-Pavement Interactions. A Symposium. Philadelphia, ASTM, July 1975, p. 127-139. UMTRI-32801 A10 (2) Gallaway, B. M.; Rose, J. G. 1971. Comparison of highway pavement friction measurements taken in the cornering-slip and skid modes. Texas Transportation Institute, College Station. 16 p. Highway Research Record, No. 376, 1971, p. 107-122. Sponsor: Texas Highway Department, Austin; Federal Highway Administration, Washington, D.C. UMTRI-50676 A20 The page http://www.umtri.umich.edu/library/publications.html provides information on how to obtain copies of documents. Good luck, Zevi Bareket. _____________________________________________________________ Zevi Bareket 2901 Baxter Rd. Sr. Research Associate Ann Arbor, MI 48109-2150 Engineering Research Division Phone: (734) 936-1067 Transportation Research Institute Fax: (734) 936-1068 University of Michigan e-mail: [log in to unmask] http://www.umtri.umich.edu/ _____________________________________________________________ On 8/27/02 7:46 AM, "˜ÓÚÂÔÝ•ÒÈÎÈ" <[log in to unmask]> wrote: > Dear Group Members, > > We are conducting friction measurements using a ³NORSEMETER² system. The > measurements are conducted under the following procedure: > > *speed 75 kmh > > *slip ratio 86% fixed > > *smooth tires > > We are looking for any information on skid resistance values (typical values, > criteria etc.) available for asphalt pavements, collected under similar > conditions. > > Thanks for your help > > Shimon Nesichi, Managing Director, > > Materials and Research Division, > > Public Works Department, > > ISRAEL > > >