Guidance to Predict and Mitigate Dynamic Hydroplaning on Roadways (2021) / Chapter Skim
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1 SUMMARY This report presents the results of National Cooperative Highway Research (NCHRP) Project 1555, aimed at enhancing the way we understand and assess hydroplaning on roadways.
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2 available models and approaches, recommended the submodels most appropriate for incorporation into an Integrated Hydroplaning Model, and identified the main gaps in current practice. The assessment suggested that the models and approaches used to date had two main limitations and areas for improvements: 1.
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3 models were used to assess the ability of three types of vehicles (sedan, hatchback and SUV) to brake and maneuver a curve given the WFT and the other conditions (grade, superelevation, curvature, tire condition, etc.)
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4 The tool uses simplified water accumulation equations and an interpolation method to estimate the PM for one of the three vehicles modeled with new or worn tires under a specific maneuver (defined by the curvature speed and braking) on a specific roadway segment with a specific precipitation level.
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5 The Integrated Hydroplaning Model required the simplification and/or assumptions with respect to the boundary conditions on the three-dimensional water flow model, the integration of the submodel and the shape of the Performance Envelope, and the number of vehicles and tire types considered in the study. The model development included limited verification based on previous research, field verification, and sensitivity analysis.
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