Analysis of Naturalistic Driving Study Data: Roadway Departures on Rural Two-Lane Curves (2014) / Chapter Skim
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Pages 29-36
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29 C h a p t e r 6 This chapter discusses the first research question: What defines the curve area of influence? Drivers begin to react to a curve at some distance upstream.
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30 reaction point to represent normal driving. Data were extracted for each curve of interest for a distance of 400 m (1,312.3 ft)
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31 A second model was developed for traces for 11 curves in Indiana for which multiple drivers were available. A Bayesian hierarchical change point model is as follows: ( )
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32 Figure 6.3. Fitted speed models for Indiana curves.
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33 before the point of curvature, and the closest reaction point was approximately 13 m (42.7 ft) before the point of curvature, with the mean reaction point about 179 m (587.3 ft)
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34 Figure 6.7. Fitted pedal position models for New York curves.
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35 were coded as 0 for inside and 1 for outside, so this estimate indicates that the reaction point moves on average about 2 m (6.6 ft) further from the point of curvature when the driver is traveling on the outside of the curve.
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36 of getting a driver's attention. Additionally, drivers traveling at appropriate speeds do not need to reduce speed to the same extent on curves without advisory speeds as for curves where deceleration is necessary.
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