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Title:

Using Visual Behavior to Provide an Improved Understanding of the Relationship between the Workload Imposed by In-Vehicle Tasks and Driving Performance

Accession Number:

01372454

Record Type:

Component

Abstract:

In this work, the relationship between workload increased by a set of In-Vehicle visual tasks and driving performance was investigated in a free driving condition using an Instrumented Vehicle in real traffic. The information of drivers’ subjective rating of their extra workload, secondary and primary driving performance, as well as eye movement data were collected in the experiment, with in total 41 participants (29 male and 12 female). The experiment results showed that the In-Vehicle visual tasks have negative effects on driving performance, and drivers’ visual behavior changed accordingly. A reduced speed, higher deviation of speed, more steering wheel adjustments and less predictable steering behaviour were found when drivers were performing the visual tasks. At the same time, a decrease of looking ahead was replaced by checking the touch screen associated with the visual tasks, and a significant increase in drivers’ saccade (or rapid eye movement) rate was also observed when the difficulty level increased. Although weak, some significant correlations between driving performance and visual behavior measurements were found, regardless of individual difference. The increase in frequency of steering wheel adjustments were positively correlated with the percentage of time spent looking at the touch screen and saccade rate, and negatively correlated with time spent on the view ahead. Future research will investigate this correlation across different driver groups to study the effect of information organising and task prioritising on drivers’ performance using eye movement measurements.

Supplemental Notes:

This paper was sponsored by TRB committee AND10 Vehicle User Characteristics

Monograph Accession #:

01362476

Report/Paper Numbers:

12-4680

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Yang, Yan
McDonald, Mike

Pagination:

14p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Safety and Human Factors; I83: Accidents and the Human Factor

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-4680

Files:

TRIS, TRB

Created Date:

Feb 8 2012 5:26PM