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 B - Project 5 Data Dictionary
Appendix B - Project 5 Data Dictionary
Pages 87-93
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From page 87... ...
Specific categories regarding scenario details were different for each system. Each of the scenario coding keys is described after the driver behavior key.
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From page 88... ...
Reviewers agreed on an area or box they considered to be looking forward; this allowed for slight glances but even many scans across the forward scene were considered glances away. This process defined looking forward narrowly and essentially as meaning straight forward.
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From page 89... ...
(Steering, for review purposes, was an evasive maneuver in an attempt to avoid striking a vehicle; thus there must have been a significant amount of steering.) Hand Location at Time of Alert Both hands were not often visible, so reviewers coded what could confidently be inferred from the scene.
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From page 90... ...
(Enter in notes.) Road Condition Glare and reflection helped determine whether the road was dry or wet.
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From page 91... ...
If any portion of the road, including turn lanes, was covered in snow, the classification was snow covered.) Precipitation Spots on the windshield or wiper activity helped determine if there was precipitation.
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From page 92... ...
Visual Occlusion Rear taillights, glare from rain and wetness on the road, blurry video, dirty windshield, temporary incapacitation, sneezing, flying debris, faulty wiper or defroster, and object in or over the driver's eyes. Nondriving Behaviors Whistling, two or more behaviors, if there is no audio and the driver is clearly talking or singing but reviewers could not tell which, attempting to avoid insect in car, adjusting mirrors, reading map, reading other materials, checking watch, or yawning.
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From page 93... ...
For example, if the vehicle was drifting in the lane at the time of the alert, then crossed the lane line, and finally returned to its original lane, only the eventually crossed option would be selected. The fact that the vehicle had ultimately returned to its original lane was addressed in the additional driving circumstances field, option corrected per the alert, which is detailed in the Additional Driving Circumstances section.
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