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原文传递 Naturalistic Driving Study: Descriptive Comparison of the Study Sample with National Data.

题名：	Naturalistic Driving Study: Descriptive Comparison of the Study Sample with National Data.
关键词：	Highways, Naturalistic driving study (NDS), National data, Innovative techniques, Construction management procedures, Financial constraints, Operational constraints, Strategic planning approach, Crash data and analysis, Driver behaviors
摘要：	The second Strategic Highway Research Program (SHRP 2) naturalistic driving study (NDS) comprises the largest set of naturalistic driving data ever collected in a single study, with more than 3,100 participants from six geographically dispersed sites across the United States. Volunteer participants were observed for more than three years in all, producing some 50 million miles of naturalistic driving data from kinematic and other sensors, as well as from four-channel video (Dingus et al. 2014). The combined video is illustrated in Figure 1.1. Sensors included accelerometers in three dimensions, a global positioning system, forward radar, and others. The SHRP 2 data set is expected to help a generation of researchers address a myriad of crucial transportation safety and other questions. However, to properly analyze these data and meaningfully interpret results, one must first understand the degree to which the data sample can be used to study the target population of interest: all drivers in the United States. Simply stated, the primary goal of the SHRP 2 NDS was to collect and archive the largest set of naturalistic driving data in history. More specifically, adequate samples of key driver, vehicle, and environmental characteristics were identified as integral to a thoughtful examination of driver behaviors, particularly those associated with crash-related events. Additional layers of challenge were presented by the study’s financial and operational constraints, all of which necessitated savvy strategic planning in the precollection phase. In addition, nimble management of the ongoing study was required as novel challenges continually emerged as the study progressed.
报告类型：	科技报告