Effects of asphalt pavement texture on hydroplaning threshold speed

Dehnad, Mohamad Hosein; Khodaii, Ali

doi:10.1007/s11771-019-3998-6

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…Pavement surface characteristics and rainfall intensity are the major contributing factors to a pavement's WFD (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27). Mean texture depth (MTD) represents pavement macrotexture, defined as the texture with wavelengths of 0.02 to 2.0 in., and is the main attribute of a pavement surface.…”

Section: Research Significantmentioning

confidence: 99%

“…Reducing the WFD on a pavement surface using proper surface drainage, such as grooved and porous surfaces, improves road traffic safety (1,2,(5)(6)(7)9). Using a high macrotexture pavement surface is also another approach which reduces the WFD on existing roads where the high surface texture will help in draining the water from a pavement surface to the texture pores or channels (7,10). One of the high macrotexture pavements is a chip seal where a single layer of aggregate is embedded into a bituminous binder.…”

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confidence: 99%

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Water Film Depth Prediction Model for Highly Textured Pavement Surface Drainage

Pourhassan

Gheni

ElGawady

2021

Transportation Research Record: Journal of the Transportation R

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Water film depth (WFD) is an important factor for road traffic safety because of its direct connection with skid resistance, hydroplaning speed, and the tendency of splash and spray. Increasing the pavement macrotexture reduces WFD. However, existing models for WFD prediction have not been developed on highly textured surfaces such as chip seal. Furthermore, the rainfall intensities used for developing most of these models were relatively low, leaving no or low WFD on chip seal surfaces. To propose a WFD prediction model suitable for highly textured surfaces and to consider the effect of surface material type, an experimental study was conducted with 154 different combinations of mean texture depth (MTD), surface material type, surface slope, drainage length, and rainfall intensity. The tests were carried out on chip seal specimens using a full-scale rainfall simulator. Test results from 1,784 WFD readings indicated that the Gallaway and PAVDRN models were not accurate for highly textured surfaces used in this study with MTD ranging from 0.05 to 0.20 in. Two experimental models were, therefore, proposed to predict the WFD; both models displayed a significantly higher correlation between the measured and predicted WFD compared with the existing models. Furthermore, the eco-friendly rubberized chip seal showed an enhanced drainage capability compared with conventional chip seal, especially in low slopes, because of the hydrophobic nature of crumb rubber versus the hydrophilic character of mineral aggregates. Accordingly, the proposed model incorporated a term to consider the effect of surface material type.

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