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Guidance to Predict and Mitigate Dynamic Hydroplaning on Roadways

项目名称：	Guidance to Predict and Mitigate Dynamic Hydroplaning on Roadways
摘要：	Roadways are designed, operated, and maintained with a goal of achieving the highest possible safety outcomes. With safety as their top priority, transportation officials are responsible for the careful management of public resources and effective risk assessment. Hydroplaning occurs when a tire loses contact with water-covered pavement by the actions of water pressures that build up with increasing vehicle speed. Transportation practitioners have observed that available methods for predicting hydroplaning potential imply a greater likelihood of hydroplaning occurrences than are reported in crash data. Additionally, there is inadequate guidance on how to effectively plan and implement strategies to mitigate the impacts of hydroplaning for site-specific conditions, such as geometric design, and different project types (e.g., new construction, reconstruction, or maintenance/retrofit projects). More thorough and up-to-date guidance is needed to identify the potential for, reduce the occurrence of, and mitigate the impacts of dynamic hydroplaning on roadways. To develop this guidance, research is needed to identify and address the factors contributing to hydroplaning and how these factors interact. These factors may include, but are not limited to, hydraulics, roadway characteristics, vehicle characteristics, and driver behavior. A clearer understanding of how these factors contribute to hydroplaning could result in safety improvements, fewer crashes, and savings. The methods that are widely used to predict hydroplaning potential need to be evaluated and updated. These methods include the PAVDRN program, developed in NCHRP Project 01-29, "Improved Surface Drainage of Pavements" (1998). Changes have occurred since the methods were developed that could either increase or decrease the likelihood of hydroplaning and crashes on roadways, including, but not limited to the following: (1) The number of lanes on roadways have increased; (2) Design and posted speeds on roadways have increased; (3) Vehicles have changed (although vehicles are often lighter which makes them more vulnerable to hydroplaning, recent features reduce the likelihood of hydroplaning such as antilock brakes, stability controls, and front- or all-wheel drive); and (4) Tire designs have improved with increased sizes and wheel widths, higher tire pressures, better tread design, and greater use of radial tires. The objective of this research is to develop guidance to predict and mitigate hydroplaning on roadways. The term �hydroplaning� in this research is limited to dynamic hydroplaning only, and does not include other forms of hydroplaning, such as viscous or rubber reversion hydroplaning. The guidance should be applicable to all types of roadways, including site-specific factors such as geometric design, and be appropriate for new construction, reconstruction, and maintenance/retrofit projects. The guidance should: (1) Address the hydraulics, roadway characteristics, vehicle characteristics, driver behavior, and other factors that contribute to hydroplaning on roadways. (2) Include an updated and validated methodology(s) to predict hydroplaning potential on roadways. (3) Provide methods and strategies for planning and design of roadways to mitigate hydroplaning. (4) Provide methods and strategies to reduce hydroplaning on existing roadways. (5) Identify driver-related factors that contribute to crashes associated with hydroplaning and recommend operational strategies to mitigate these crashes.
状态：	Active
资金：	500000
资助组织：	National Cooperative Highway Research Program
项目负责人：	Schwager, Dianne S
执行机构：	Virginia Polytechnic Institute and State University, Blacksburg
主要研究人员：	Flintsch, Gerardo
开始时间：	20150617
预计完成日期：	20171216
实际结束时间：	20171216