A Multivariate Analysis of Crash and Naturalistic Driving Data in Relation to Highway Factors (2013) / Chapter Skim
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12 Surrogates for Road Departure Crashes Overview of Available Surrogates In Chapter 5, the statistical analysis of candidate surrogates will assume a basic form of discrete (Boolean) events.
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13 deviation is based on estimates from the vision-based lane tracker on the FOT vehicle, measuring the offset of the vehicle from the center of the lane. Applying a threshold to this (see the next section for more detail)
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14 The final three surrogates in Table 4.1 are more relevant to using combinations of candidate variables. Visual interruption (VINT)
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15 The 5th percentile global value of TTEC was also determined and used as a threshold to define TTEC events for statistical modeling. A TTEC event was defined as an instance when the vehicle's TTEC was less than the 5th percentile global TTEC value.
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