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Considerations when calculating percent road centre from eye movement data in driver distraction monitoring
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0003-4134-0303
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0002-1849-9722
Swedish National Road and Transport Research Institute, Traffic and road users, Vehicle technology and simulation.
2009 (English)In: Proceedings of the Fifth International Driving Symposium on Human Factors in Driver Assessment, Training and Vehicle Design, 2009, p. 132-139Conference paper, Published paper (Refereed)
Abstract [en]

Percent road center (PRC) is a performance indicator which is sensitive to driver distraction. The original definition of PRC is based on fixation data extracted from eye movement recordings, but it has also been suggested that PRC can be determined directly from the gaze data without segmenting it into saccades and fixations. The primary aim of this paper is to investigate if this is the case.

Naturalistic driving data from a small scale field operational test comprising seven vehicles was used in the evaluation. It was found that PRC time traces based on gaze data and fixation data, respectively, were highly similar (correlation coefficient=0.95, average wavelet semblance=0.84) except for an absolute amplitude difference of about 8%. This indicates that the two approaches can be used interchangeably and that the processing step of segmenting gaze data into saccades and fixations can be left out.

In addition to this finding, design issues related to the calculation of PRC are investigated. Especially, the impact of gaze cases pointing towards the intersection of the road centre area and the centre rear mirror were investigated. Results lead to conclude that gazes and fixations on the centre rear mirror should be removed from the PRC calculations, as they may negatively influence the correctness of the performance indicator.

Place, publisher, year, edition, pages
2009. p. 132-139
Keywords [en]
Attention, Eye movement, Road, Calculation
National Category
Transport Systems and Logistics
Research subject
80 Road: Traffic safety and accidents, 841 Road: Road user behaviour
Identifiers
URN: urn:nbn:se:vti:diva-7869OAI: oai:DiVA.org:vti-7869DiVA, id: diva2:816503
Conference
Fifth International Driving Symposium on Human Factors in Driver Assessment, Training and Vehicle Design
Available from: 2015-06-03 Created: 2015-05-28 Last updated: 2020-01-23Bibliographically approved

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fulltext(179 kB)407 downloads
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Ahlström, ChristerKircher, KatjaKircher, Albert

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CiteExportLink to record
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Citation style
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