Browsing by Subject "Event data recorders"
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Item Developing and Validating a Model of Left-Turn Crashes to Support Safer Design and Operations(Center for Transportation Studies, University of Minnesota, 2018-09) Davis, Gary; Gao, Jingru; Mudgal, AbhisekThis report documents work done to advance the state of art in crash simulation. This includes: (1) A field study to collect data on drivers’ left-turn gap acceptance and turning times, and development of statistical models that can be incorporated into a crash simulation model; (2) The use of Markov Chain Monte Carlo computational tools to quantify uncertainty in planar impact reconstruction of two-vehicle crashes; (3) A method for combing the results from planar impact reconstruction with event data recorder pre-crash data to estimate descriptive features of actual left-turn crashes. This is applied to several left-turn crashes from the National Highway Traffic Safety Administration’s NASS/CDS database; (4) A left-turn crash simulation model incorporating the above results. Initial model checking is performed using estimates from the reconstructed NASS/CDS cases as well as results from a previous study on left-turn crash risk. Also described is a method for simulating crash modification effects without having to first simulate crashes as rare outcomes in very large numbers of gap acceptances.Item ITS and Locational Privacy: Suggestions for Peaceful Coexistence(University of Minnesota Center for Transportation Studies, 2011-10) Douma, Frank; Aue, SarahContinuing developments in the fields of transportation technology and privacy law present an abundance of opportunities for conflict. Without knowledge of the legal framework that applies to emerging technology, Intelligent Transportation System (ITS) developers set themselves up for frustration as ideas that appear flawless in an engineering office may become controversial when they reach the implementation stage. From the legal perspective, advocates of comprehensive privacy law struggle to update existing law at a pace that keeps up with innovative advancements in technology. This paper reviews several cases where implementation of transportation technologies has raised civil liberties arguments, examining them from legal and political perspectives. The understanding of privacy both as a political concept and a legal protection provides the foundation for future ITS progress, allowing new technologies to be developed in ways that can withstand these types of challenges or avoid them altogether.