This report lists the desirable features that should be included in a laboratory method for evaluating the skidding resistance of different types of pavement surfaces, and discusses them in light of previous research. The lab-*

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The majority of the highways which have been constructed recently, whether of portland cement or of bituminous materials Initially have exhibited good resistance to skidding for the critical design condition, which occurs when tha surface is wet* Unfortunately, for many of these pavements this initial skid resistance has been short-lived The anti-ekid properties of a well-designed pavement surface are dependent to a large degree u;x>n the polishing characteristics of the mineral ag« gregate or aggregates of which the paving mixture is composed,, Although the type of cene.iting agent, the gradation, and the openness of the sur« face have some effect upon the rate at which polishing progresses, the ultimate state of slipperiness is determined by the nature of wear of the pavement vAdch, in turn, is directly related to the resistance to polishing of the surface aggregate,. If highways are to be build which possess adequate anti-siid characteristics for a reasonable period of wear under the ever-increasing polishing effect of traffic, consideration must be given to the slipperiness potential of highway materials of which paving mixtures are composed, so that adequate skid resistance ray be included as a design parameter A laboratory investigation vas undertaken at Purdue University in an en-> deavor to contribute to a better understanding of some of the variables involved in pavement slipperinesso This paper is a report of a phase of

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