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Trade-offs in traffic: does being mainly a car driver or a cyclist affect adaptive behaviour while driving and cycling?
Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences. Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0002-8701-8689
2020 (English)In: European Transport Research Review, ISSN 1867-0717, E-ISSN 1866-8887, Vol. 12, no 1, article id 12Article in journal (Refereed) Published
Abstract [en]

Aim Road users, such as cyclists and car drivers, are constantly adapting to each other and to the road infrastructure. This study aimed to investigate what trade-offs can be observed when drivers and cyclists adapt to other road users and to the infrastructure. Methods A semi-controlled study was carried out in an urban traffic environment, where all participants travelled the same route twice, once as a cyclist and once as a car driver. The extended control model was used as an analytical framework to examine how people adapt depending on their main and current road-user role, experiencing different infrastructure and complexity. Results The results revealed possible trade-offs made while adapting, mainly in relation to rule-following. No differences in adaptive behaviour between people who mostly drive and people who mostly cycle were found. The current situational demands influence both the need to adapt and the adaptation carried out. A more complex traffic environment led to increased information intake, measured by glance behaviour.

Place, publisher, year, edition, pages
SPRINGEROPEN , 2020. Vol. 12, no 1, article id 12
Keywords [en]
Behavioural adaptation; Cyclist; Driver; ECOM; Comfort zone; Complexity
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:liu:diva-165002DOI: 10.1186/s12544-020-0396-yISI: 000520478200001OAI: oai:DiVA.org:liu-165002DiVA, id: diva2:1422731
Note

Funding Agencies|Strategic Vehicle Research and Innovation Programme (FFI) - Swedish state; Strategic Vehicle Research and Innovation Programme (FFI) - Swedish automotive industry

Available from: 2020-04-08 Created: 2020-04-08 Last updated: 2020-05-06
In thesis
1. Adaptive behaviour in traffic: An individual road user perspective
Open this publication in new window or tab >>Adaptive behaviour in traffic: An individual road user perspective
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Road-user adaptation is a prerequisite for traffic to run smoothly. By adaptation, the road user aims to ensure a feeling of comfort according to his or her present state and capability. In this thesis, adaptive behaviour of car drivers and cyclists in response to different factors is explored, using the individual perspective of the road user. The research focuses on investigating how adaptation in the road traffic environment can be described, and what adaptations road users make in traffic in response to static and dynamic infrastructure, additional tasks and other road users.

One simulator study and three field studies in real traffic were carried out. The study results implied that the current road-user role and the preconditions for that role, in terms of vehicle and infrastructure, affect adaptive behaviour. The results also showed that in non-complex situations, there is a certain level of visual guidance above which more detailed information does not have any effect on speed adaptation. Detailed information that allows road users to improve their predictions to take action to ensure a feeling of comfort, is however preferred. Under increased situational demands, vehicle speed can be reduced to maintain the safety margins. It was found that there are individual strategies concerning what degree of complexity for interaction with an additional task is acceptable.

A conceptual model of adaptation in relation to the environment and subjective perceptions of safety and a feeling of comfort is proposed and applied to different traffic situations. For future transport system designs it is advised that adaptive behaviours of road users are supported.

Abstract [sv]

Att trafikanterna anpassar sig är en förutsättning för ett välfungerande vägsystem. Genom anpassning försöker trafikanten säkerställa en känsla av komfort med hänsyn till hans eller hennes nuvarande tillstånd och förmåga. I denna avhandling undersöks bilförares och cyklisters anpassningsbeteende i samband med olika faktorer, utifrån ett individuellt trafikantperspektiv. Forskningen är inriktad på att undersöka hur anpassning i vägtrafikmiljön kan beskrivas, samt vilka anpassningar trafikanter gör i relation till statisk och dynamisk vägutrustning, extrauppgifter och andra trafikanter.

En simulatorstudie och tre fältstudier i verklig trafik har genomförts. Studieresultaten antydde att den roll som trafikanten har för tillfället, samt de förutsättningar som den rollen innebär i form av fordon och infrastruktur, påverkar anpassningsbeteendet. Resultaten visade också att om den visuella ledningen är över en viss nivå har inte mer detaljerad visuell information någon effekt på hastighetsanpassningen i icke-komplexa situationer. Trafikanterna föredrar dock mer detaljerad information om den gör det lättare att bedöma hur trafiksituationen kommer att utvecklas. Om komplexiteten ökar kan fordonshastigheten minskas för att bibehålla tillräckligt stora säkerhetsmarginaler. Hur man interagerar med extrauppgifter är individuellt och beror på vilken svårighetsnivå för interaktion som individen själv upplever är acceptabel.

En konceptuell modell för anpassning föreslås som tar hänsyn till trafikmiljön och trafikantens upplevelse av säkerhet och känsla av komfort. Framtida trafiksystem bör utformas för att stödja trafikanternas anpassningsbeteenden.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2020. p. 68
Series
Linköping Studies in Arts and Sciences, ISSN 0282-9800 ; 787
Keywords
Adaptation, road-user, comfort zone
National Category
Human Computer Interaction
Identifiers
urn:nbn:se:liu:diva-164952 (URN)10.3384/diss.diva-164952 (DOI)9789179298579 (ISBN)
Public defence
2020-06-04, Ada Lovelace, B-building, Campus Valla, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2020-05-07 Created: 2020-05-05 Last updated: 2020-05-20Bibliographically approved

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