@BOOK{NAP13561, author = "Transportation Research Board and Transportation Research Board", title = "Crash Reduction Factors for Traffic Engineering and Intelligent Transportation System (ITS) Improvements: State-of-Knowledge Report", doi = "10.17226/13561", abstract = "TRB's National Cooperative Highway Research Program (NCHRP) Research Results Digest 299--Crash Reduction Factors for Traffic Engineering and Intelligent Transportation System (ITS) Improvements: State-of-Knowledge Report summarizes the current status of crash reduction factors for a variety of treatments and provides a summary of the \"best available\" crash reduction factors. The report also reviews the relationship between NCHRP Project 17-25, \"Crash Reduction Factors for Traffic Engineering and ITS Improvements,\" and other ongoing research studies that are either documenting or developing additional crash reduction factors.", url = "https://nap.nationalacademies.org/catalog/13561/crash-reduction-factors-for-traffic-engineering-and-intelligent-transportation-system-its-improvements-state-of-knowledge-report", year = 2005, publisher = "The National Academies Press", address = "Washington, DC" }