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原文传递 Reliability-Based Safety Risk and Cost Production of Large Trucks on Rural Highways.

题名：	Reliability-Based Safety Risk and Cost Production of Large Trucks on Rural Highways.
关键词：	reliability；production；rural；large；safety；base；cost；high；conditions；framework
摘要：	The primary causes of accidents involving large trucks on rural highways were found to be excessive speed and adverse driving conditions. Different from passenger vehicles, it is known that the safety performance of large trucks in adverse driving conditions greatly depends on the specific terrain and local weather conditions. By integrating both historical data analysis and simulations, a multi-scale investigation is conducted to evaluate the traffic safety of large trucks on mountainous interstate highways. Firstly, the ten-year historical accident records are analyzed to identify the accident-vulnerable-locations (AVLs) and site-specific critical adverse driving conditions. Secondly, a simulation-based single-vehicle assessment is performed for predicting the large-truck accident risks with the combination of given weather, topographical, road, and vehicle information at those AVLs along the entire corridor. A framework of a reliability-based assessment model of vehicle safety under adverse driving conditions is developed. Such a framework is built based on the advanced transient dynamic vehicle simulation models, which can consider the coupling effects between vehicles and adverse driving conditions, such as wind gust, snow-covered or icy road surfaces and/or curving. The single-vehicle safety index is introduced to provide rational assessment of accident risks by considering uncertainties of critical variables. Finally, GIS maps with topographic conditions embedded are generated. By displaying the data on the GIS-based map, different accident risk indices can easily be displayed and compared on the GIS map. A typical mountainous highway in Colorado is studied for demonstration purposes.
报告类型：	科技报告