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原文传递 ADOT State-Specified Crash Prediction Models: An Arizona Needs Studied

题名：	ADOT State-Specified Crash Prediction Models: An Arizona Needs Studied
作者：	Colety, M.; Crowther, B.; Bahar, G.; Srinivasan, R.
关键词：	Safety performance##Congestion controls##Pavement conditions##Implementation##Recommendations##Traffic engineering##Service life cycle##Concrete durabality##Infrastructure results##Roadway systems##Methodology##South Carolina (State)##
摘要：	The predictive method in the Highway Safety Manual (HSM) includes a safety performance function (SPF), crash modification factors (CMFs), and a local calibration factor (C), if available. Two alternatives exist for applying the HSM prediction methodology to local conditions. They are either calibration of the SPFs found in the HSM or the development of jurisdiction-specific SPFs The objective of this study was to develop a process to evaluate the SPFs contained in the HSM for road segments and intersections on the Arizona State Highway System and to determine if those SPFs should be calibrated or if Arizona-specific SPFs should be developed. The recommendations are that ADOT move forward with SPF calibration for all HSM safety performance functions as for project-level safety analysis in Arizona. A specific calibration function has been calculated for two-lane rural undivided highways. Safety analysis is progressing at a promising rate and can be used to attain significant reductions in fatal crashes and crash severity. To achieve this, ADOT will need to make a significant commitment to developing and maintaining a comprehensive database of roadway characteristics combined with crash data and average annual daily traffic volume data that are all linked through a common linear
总页数：	213
报告类型：	科技报告