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Speed reductions and judgments of travel time loss: Biases and debiasing
Stockholm University, Faculty of Social Sciences, Department of Psychology, Cognitive psychology. Decision Research, USA.
Stockholm University, Faculty of Social Sciences, Department of Psychology. Decision Research, USA; Leiden University, The Netherlands.
Number of Authors: 2
2017 (English)In: Transportation Research Part F: Traffic Psychology and Behaviour, ISSN 1369-8478, E-ISSN 1873-5517, Vol. 51, p. 145-153Article in journal (Refereed) Published
Abstract [en]

Priority decisions concerning maintenance or reconstruction of roads are made with the aim of road improvements with as little traffic disturbance and time loss as possible. However, it cannot be avoided that speed will be reduced and travel time increased during the time of construction. The present study shows how intuitive judgments of travel time losses are biased in a way similar to the times saving bias (Svenson, 2008), but not perfectly corresponding to that bias. This means that when speed is decreased from a slow speed <50 km/h, the time loss is underestimated and when speed is decreased from a high speed >80 km/h it is overestimated. Also, drivers, politicians and policy makers who do not make exact calculations are likely victims of the time loss bias. The time loss bias was weakened but not eliminated by a debiasing instruction including mathematical computations of travel times. When driving speed restrictions are implemented, in particular on fast motorways, it is necessary to consider and counteract the time loss bias and inform the public. This can be done, for example, in communications about travel time facts, by information in driver training and by mounting temporary road signs informing about the average travel time prolongation due to a road work.

Place, publisher, year, edition, pages
2017. Vol. 51, p. 145-153
Keyword [en]
driving, traffic planning, travel time, speed limits, time loss, judgments, debiasing
National Category
Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-150021DOI: 10.1016/j.trf.2017.09.007ISI: 000414889100011OAI: oai:DiVA.org:su-150021DiVA, id: diva2:1167440
Available from: 2017-12-18 Created: 2017-12-18 Last updated: 2018-01-15Bibliographically approved

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