Application of the probability theory to the design procedure of an endurance test track surface. Paper presented at the International Automotive Engineering Congress, Detroit, Michigan, January, 13-17, 1969.

The probability theory is applied to the design procedure of a test track surface in order to obtain good similarity in statistical data between the endurance test results on the test track and the real situation with customer usage, and to reduce the endurance test period. Experimental results on this test track and the other tracks are also discussed in this paper.