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Development of Crash Modification Factors for the District of Columbia

项目名称：	Development of Crash Modification Factors for the District of Columbia
摘要：	The appropriate selection of cost-effective countermeasures for highway safety improvement projects requires an estimate of the safety effects of alternative designs. The District Department of Transportation (DDOT), like many agencies, makes these estimates using crash reduction factors (CRFs). Identification and implementation of countermeasures are keys to safety improvement planning. The estimated economic benefits clearly depend on expected crash reductions from each countermeasure, yet these projections are considered the least certain element of the safety improvement planning process. These projections are called crash reduction factors (CRFs) and are estimates of the expected reduction in different crash types following the implementation of a particular countermeasure. Most states have compiled their lists of CRFs from the literature coupled with evaluations of their own projects, through the conduct of statistically valid studies of these countermeasures. Currently, DDOT relies on the national CRF values, which may or may not address local experience and impact from countermeasure implementations. This research is therefore aimed at developing a complete CRF list specifically for the District of Columbia, based on data on countermeasure implementations and projects.
状态：	Terminated
资金：	118745.00
资助组织：	District of Columbia Department of Transportation
执行机构：	Howard University
开始时间：	20111001
主题领域：	Highways；Safety and Human Factors