Evaluation of Data Needs, Crash Surrogates, and Analysis Methods to Address Lane Departure Research Questions Using Naturalistic Driving Study Data (2011) / Chapter Skim
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C H A P T E R 3 Data Sets UsedThe following sections describe the data sets used throughout this report for the various analyses. Appendix A provides a detailed description the variables included in the UMTRI data set, as well as a description of how a number of variables were extracted.
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23a curve were also provided as samples of regular driving and included approximately 60 s of data. The database contained a number of data fields (columns)
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24many features maintained as part of this framework. Roadway attributes include linear referencing descriptors, road name, address ranges, functional class, and legal ownership.
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25received. It is unknown if the data represented all run-off-road crashes and near crashes.
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26• Frame: A frame is one row of data from the continuous data. At 10 Hz this represents a 0.1-s interval.
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