Bicycling tasks relation to stability measures during alcohol intoxication
DOI:
https://doi.org/10.55329/ymam9256Keywords:
alcohol intoxication, roll rate, stability, yaw rateAbstract
Bicycling accidents are a major traffic safety problem and are deemed ‘an unacceptable human and social price for EU citizens’. One of the major causes for bicycling accidents is loss of balance. A related influencing factor is alcohol intoxication. It is a primary, long term, safety objective to develop safety systems for the cyclist. The present work aimed to understand how to measure cyclists’ instability via steering and leaning inputs, while considering that steering and leaning might vary depending on the cycling task being performed. Of 28 participants, 19 were given doses of alcohol up to 1.0‰ and 9 remained sober (control group). Breath alcohol concentration was measured. The participants repeated the cycling test track session five times (with each block lasting 35 minutes). The track session contained three different tasks: cycling slalom, straight, and slowly. Speed, yaw rate, and roll rate were assessed continuously. Yaw rate and roll rate were relatively sensitive for the different cycling tasks. The threshold level of the angular velocity measurements was related to the cycling task performed. Alcohol intoxication at 0.7‰ had a significant impact on performance. The rather simple measurements used can detect instability. Instability should be measured differently depending on the cycling task performed. The study represents a small step towards a safety system for cyclists.
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Author Biographies
Jan Andersson, Swedish National Road and Transport Research Institute, Sweden
Jan Andersson is a professor at the research department Traffic and Road users, VTI, Linköping. His research area is traffic safety, accessibility, and mobility from a user-centred perspective. Examples of ongoing bicycling research projects are (i) Alcohol and bicycling stability: Develop an understanding of how intoxication affects bicycling ability in different ways; (ii) Bicycle accidents: In collaboration with Hövding increase knowledge on why bicycle accidents occur; (iii) The bicycle system of the future: Develops functions for increased traffic safety and mobility with the help of the possibilities of electrification and digitization.
CRediT contribution: Conceptualization, Formal analysis, Investigation, Methodology, Project administration, Resources, Writing—original draft.
Henriette Wallén Warner, Swedish National Road and Transport Research Institute, Sweden
Henriette Wallén Warner is a Senior Researcher at the Swedish National Road and Transport Research Institute (VTI) and an Associate Professor at Uppsala University. Her main area of research is road user behaviour with a special interest for vulnerable road users and road safety. She has published numerous peer-reviewed articles, delivered conference presentations in a dozen countries and on a regular basis been involved in peer-reviewing for scientific journals and international conferences.
CRediT contribution: Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Writing—original draft.
Peter Andrén, Swedish National Road and Transport Research Institute, Sweden
Peter Andrén is a consultant researcher at the Swedish National Road and Transport Research Institute (VTI). He assists with programming data processing and technical writing in a wide variety of projects, with a focus on road condition assessment.
CRediT contribution: Data curation, Writing—original draft.
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Copyright (c) 2024 Jan Andersson, Henriette Wallén Warner, Peter Andrén
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Trafikverket
Grant numbers TRV 2020/112351
