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Slippery warning sign in New Taipei, Taiwan.

Slipperiness is the degree of risk of slippage or falling when walking on a wet surface such as a pathway, boat deck or roadway. Road slipperiness is a major area of road safety, but various means have also been developed to measure walkway and deck slipperiness in order to develop health and safety standards.[1] Energy loss over a measured distance of movement across a surface is called the "anti-slip" coefficient.[2][3]


  1. ^ Wen-Ruey Chang, Theodore K. Courtney, Raoul Grongvist Measuring Slipperiness: Human Locomotion and Surface Factors 2002 0415298288 "A number of 'purely' subjective approaches (e.g. paired comparisons) have been applied to measure slipperiness. Human subjects seem to be capable of differentiating the slipperiness of floors (Yoshioka et al. 1978, 1979, Swensen et al."
  2. ^ Causes and Measurements of Walkway Slipperiness 1961 slipperiness of walkway surfaces. [7,8]. The design is based on the premise that, in the process of ordinary Walking, slipping is most likely to occur when the rear edge of the heel contacts the walkway surface. The value obtained by this machine, the energy loss in a measured distance of movement across the surface, is called the "anti-slip" coefficient."
  3. ^ Percy A. Sigler, Relative slipperiness of floor and deck surfaces United States National Bureau of Standards 1943 p 1 "Summary of results and comments : ABSTRACT A new pendulum-type machine and a method for determining the relative slipperiness of floor surfaces under various conditions are described. The surfaces were tested when dry and clean, ."