| Abstract: | Reported in Phase I of this research is a study concerned with determining the amount of water which can be expected to exist on various pavement types under normal ranges of pavement cross slopes, rainfall intensities, pavement textures, and drainage lengths. Equations are developed which relate these variables and their relative effects to water depth. Results are presented in both tabular and figurative form. With this information as a basis, Phase II is concerned with the determination of the effects of various water depths on the friction properties of various pavement textures at different levels of vehicular speeds and tiretread depths. Equations relating these variables are also developed and the relative effects of the variables determined. Tabular and figurative methods are utilized to present the results. Background information and pertinent past research pertaining to hydraulics of water flow over paved surfaces and effects of water depth on pavement friction are given. ... |
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