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Attentional Demand as a Function of Contextual Factors in Different Traffic Scenarios
Xian Univ Posts and Telecommun, Peoples R China.
Linköping University, Department of Biomedical Engineering. Linköping University, Faculty of Science & Engineering. Swedish Natl Rd and Transport Res Inst VTI, Linkoping, Sweden.
Swedish Natl Rd and Transport Res Inst VTI, Linkoping, Sweden.
Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences. Swedish Natl Rd and Transport Res Inst VTI, Linkoping, Sweden.ORCID iD: 0000-0002-1849-9722
2019 (English)In: Human Factors, ISSN 0018-7208, E-ISSN 1547-8181, article id UNSP 0018720819869099Article in journal (Refereed) Epub ahead of print
Abstract [en]

Objective:

To assess the attentional demand of different contextual factors in driving.

Background:

The attentional demand on the driver varies with the situation. One approach for estimating the attentional demand, via spare capacity, is to use visual occlusion.

Method:

Using a 3 × 5 within-subjects design, 33 participants drove in a fixed-base simulator in three scenarios (i.e., urban, rural, and motorway), combined with five fixed occlusion durations (1.0, 1.4, 1.8, 2.2, and 2.6 s). By pressing a microswitch on a finger, the driver initiated each occlusion, which lasted for the same predetermined duration within each trial. Drivers were instructed to occlude their vision as often as possible while still driving safely.

Results:

Stepwise logistic regression per scenario indicated that the occlusion predictors varied with scenario. In the urban environment, infrastructure-related variables had the biggest influence, whereas the distance to oncoming traffic played a major role on the rural road. On the motorway, occlusion duration and time since the last occlusion were the main determinants.

Conclusion:

Spare capacity is dependent on the scenario, selected speed, and individual factors. This is important for developing workload managers, infrastructural design, and aspects related to transfer of control in automated driving.

Application:

Better knowledge of the determinants of spare capacity in the road environment can help improve workload managers, thereby contributing to more efficient and safer interaction with additional tasks.

Place, publisher, year, edition, pages
Sage Publications, 2019. article id UNSP 0018720819869099
Keywords [en]
attentional demand; visual occlusion; traffic situation; spare capacity; driving simulator
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
URN: urn:nbn:se:liu:diva-160428DOI: 10.1177/0018720819869099ISI: 000483617400001PubMedID: 31424969Scopus ID: 2-s2.0-85071458285OAI: oai:DiVA.org:liu-160428DiVA, id: diva2:1353426
Note

Funding Agencies|Swedish Governmental Agency for Innovation Systems (VINNOVA) [201103994]; Key Laboratory for Automotive Transportation Safety Enhancement Technology of the Ministry of Communication, PRC [300102229508]

Available from: 2019-09-23 Created: 2019-09-23 Last updated: 2019-10-01Bibliographically approved

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Ahlström, ChristerKircher, Katja

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