Feasibility of Using In-Vehicle Video Data to Explore How to Modify Driver Behavior That Causes Nonrecurring Congestion (2011) / Chapter Skim
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Appendix A - Project 2 Data Dictionary
Appendix A - Project 2 Data Dictionary
Pages 79-86
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From page 79... ...
The determination of whether glances were still forward or if they were away was also difficult and subjective. Reviewers agreed on an area or "box" that they considered to be looking forward; this allowed for slight glances but even many scans across the forward scene were considered glances away.
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From page 80... ...
The most common position recorded as other was the rearview mirror.) Location of Eyes During the Last Nonforward Glance and Time from the Last Nonforward Glance If the driver's eyes were on the forward scene at the moment of the alert but had looked away during some portion of the clip previous to the alert, this location was recorded.
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From page 81... ...
(Cannot tell was selected when the driver was wearing sunglasses or reviewers could not see the driver's eyes for some other reason; therefore, it was uncertain whether they were in transition.) Visual Response to Alert and Time to Visual Response Reviewers coded the time that it took the driver to initiate a visual response to the alert by filling in the number of 10ths of a second the response took.
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From page 82... ...
Hand Location at Time of Alert Because both hands were not often visible, reviewers coded what could confidently be inferred from the scene. At times playing the video farther helped determine what was ambiguous in a still frame at the time of the alert.
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From page 83... ...
(Low involvement includes scratching or running one's fingers through his or her hair.) • 90 = Other/multiple behaviors, specified in notes section.
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From page 84... ...
(This scenario occurred when there was a traffic light, stop sign, visibly stopped traffic, or the car in front of the lead had its brake lights on. These cues made it so that the host could logically anticipate that the lead would stop.
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If two alerts occurred for the same smooth transition during a two-lane pass, reviewers coded the first alert as 315 and did not code the second alert in the series. Reviewers commented on the scenario in the notes section, labeling the second alert as such in the notes section.
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From page 86... ...
The category also allowed reviewers to indicate two scenarios when the primary scenario was difficult to determine. If reviewers did not indicate a supplementary scenario, a 0 was entered for none.Notes A notes section recorded any unusual events or ambiguous situations not covered by categories for a particular question.
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