Abstract
Based on calls for innovative ways of reducing car traffic and research indicating that car driving is often the result of habitual decision-making and choice processes, this paper reports on a field experiment designed to test a tool aimed to entice drivers to skip the habitual choice of the car and consider using—or at least trying—public transport instead. About 1,000 car drivers participated in the experiment either as experimental subjects, receiving a free one-month travelcard, or as control subjects. As predicted, the intervention had a significant impact on drivers’ use of public transport and it also neutralized the impact of car driving habits on mode choice. However, in the longer run (i.e., four months after the experiment) experimental subjects did not use public transport more than control subjects. Hence, it seems that although many car drivers choose travel mode habitually, their final choice is consistent with their informed preferences, given the current price–quality relationships of the various options.
Similar content being viewed by others
Notes
We are grateful to Hovedstadens Udviklingsråd, HUR, for providing the free month travel cards.
Cf., for instance, the Australian TravelSmart campaign, which bundles a free travel card for a month with thorough and customized information about public transport and which reserves this offer to commuters who do not currently use public transport, but who expresses an interest in doing so in the future (see James 2002; Thøgersen 2007).
The data was collected by TNS Gallup.
Of the households in the Copenhagen area, 38% have a car (Danmarks Statistik 2001).
Due to 30 experimental subjects being excluded, the proportions in the final sample became 31%/69%. The excluded subjects did not differ significantly (the 5% level) from included subjects on any of the target variables in the first wave.
Due to a mixture of panel attrition and missing values, the effective sample for this calculation was reduced from 322 to 264.
Also, a hierarchical regression analysis where only the direct effects are included in step 1 and the interaction term is added in step 2 produces a statistically significant change in R 2 from step 1 to step 2 (R 2−change = 0.07, F-change (1 d.f.) = 29.789, p < 0.001).
The calculation based on centered variables produces the correct t-values for direct as well as interaction effects. However, in order to obtain the correct standardized coefficients for interaction terms, the interaction terms need to be calculated from standardized input variables (Aiken and West 1991), which we did in all the reported calculations.
In the next step we will investigate whether it is really the free travel card that is responsible for this effect.
Because customized timetables were only given to participants with no intentions to commute by public transport, it is not possible to analyze the impact of this intervention on the intention–behaviour relationship.
Control subjects with no baseline intentions were excluded from this analysis because the planning exercise was only given to experimental subjects expressing intentions.
In practices, receivers of a promotion travel card would be asked to fill out a form with personal details. This form could sensibly contain a short questionnaire about routes that the person plan to take from home to work and when, where and with which lines he or she would commute by public transport next time, among other things.
References
Aarts, H., Verplanken, B., Knippenberg, A.v.: Habit and information use in travel mode choices. Acta Psychol. 96, 1–14 (1997)
Aarts, H., Verplanken, B., Knippenberg, A.v.: Predicting behavior from actions in the past: repeated decision making or a matter of habit. J. Appl. Soc. Psychol. 28, 1355–1374 (1998)
Aiken, L.S., West, S.G.: Multiple Regression: Testing and Interpreting Interactions. Sage Publications, Newbury Park (1991)
Ajzen, I., Fishbein, M.: Understanding Attitudes and Predicting Social Behavior. Prentice-Hall, Englewood Cliffs (1980)
Bamberg, S.: Effects of implementation intentions on the actual performance of new environmentally friendly behaviours - results of two field experiments. J. Environ. Psychol. 22, 399–411 (2002)
Bamberg, S., Ajzen, I., Schmidt, P.: Choice of travel mode in the theory of planned behavior: the roles of past behavior, habit, and reasoned action. Basic Appl. Soc. Psychol. 13, 175–188 (2003)
Bamberg, S., Schmidt, P.: Regulating transport: behavioral changes in the field. J. Consumer Policy 22, 479–509 (1999)
Baron, R.M., Kenny, D.A.: The moderator-mediator variable distinction in social psychological research: conceptual, strategic, and statistical considerations. J. Pers. Soc. Psychol. 51(6), 1173–1182 (1986)
Cronbach, L.: Statistical tests for moderator variables: flaws in analyses recently proposed. Psychol. Bull. 102, 414–417 (1987)
Dahlstrand, U., Biel, A.: Pro-environmental habits propensity levels in behavioral change. J. Appl. Soc. Psychol. 27, 588–602 (1997)
Danmarks Statistik.: Familiernes Bilrådighed 2001 (The Families’ Car Availability 2001). Danmarks Statistik, København (2001)
Deci, E.L., Ryan, R.M.: Intrinsic Motivation and Self-Determination in Human Behavior. Plenum Press, New York (1985)
Fazio, R.H.: Multiple processes by which attitudes guide behavior: the MODE model as an integrative framework. In: Zanna M.P. (eds.) Advances in Experimental Social Psychology, vol. 23, pp. 75–109. Academic, New York (1990)
Fujii, S., Kitamura, R.: What does a one-month free bus ticket do to habitual drivers? An experimental analysis of habit and attitude change. Transportation 30, 81–95 (2003)
Gollwitzer, P.M., Brandstatter, V.: Implementation intentions and effective goal pursuit. J. Pers. Soc. Psychol. 73, 186–199 (1997)
Guagnano, G.A., Stern, P.C., Dietz, T.: Influences on attitude-behavior relationships. A natural experiment with curbside recycling. Environ. Behav. 27, 699–718 (1995)
Gärling, T., Boe, O., Fujii, S.: Empirical tests of a model of determinants of script based driving choice. Transport. Res. F: Traffic Psychol. Behav. 4, 89–102 (2001)
HT: Trafik holdningsundersøgelse (Traffic Attitude Survey). HT og Megafon Marketing, Copenhagen (1994)
Hutton, R.B., Ahtola, O.T.: Consumer response to a five-year campaign to combat air pollution. J. Public Policy Mark. 10(1), 242–256 (1991)
James, B.: TravelSmart—large-scale cost-effective mobility management. Experiences from Perth, Western Australia. Municipal Eng. 151, 39–48 (2002)
Lahrmann, H., Lohmann-Hansen, A.: A Sustainable Transport System - From Cars to Bicycles via Incentive Motivation. Paper presented at the Civil Engineering and Environment, Vilnius Technical University Lithuania (1998)
Landis, D., Triandis, H.C., Adamopoulos, J.: Habit and behavioral intentions as predictors of social behavior. J. Soc. Psychol. 106, 227–237 (1978)
Møller, B.T., Thøgersen, J.: Car-use habits: an obstacle to the use of public transportation? In: Jensen-Butler, C., Madsen, B., Nielsen, O.A., Sloth, B. (eds.) Road Pricing, The Economy, and The Environment, pp. 301–314. Springer (2008)
Ölander, F., Thøgersen, J.: Understanding of consumer behaviour as a prerequisite for environmental protection. J. Consumer Policy 18, 317–357 (1995)
Østergaard, S., Schougaard, J.: Direkte markedsføring i HT (Direct marketing by HT). In: Lahrmann, H., Pedersen, L.H. (eds.), Trafikdage på Aalborg Universitet 1997, pp. 567–572. Transportrådet og Trafikforskningsgruppen, Aalborg Universitet, Aalborg (1997)
Ouellette, J.A., Wood, W.: Habit and intention in everyday life: the multiple processes by which past behavior predicts future behavior. Psychol. Bull. 124, 54–74 (1998)
Ronis, D.L., Yates, J.F., Kirscht, J.P.: Attitudes, decisions, and habits as determinants of repeated behavior. In: Pratkanis, A.R., Breckler, S.J., Greenwald, A.G. (eds.), Attitude structure and function, pp. 213–239. Lawrence Erlbaum, Hillsdale, NJ (1989)
Schlag, B., Teubel, U.: Public acceptability of transport pricing. IATSS Res. 21(2), 134–142 (1997)
Steg, L., Vlek, C., Rooijers, T.: Private carmobility. Problem awareness, willingness to change, and policy evaluation: a national interview study among Dutch car users. In: Zwerver, S., van Rompaey, R.S.A.R., Kok, M.T.J., Berk, M.M. (eds.), Climate Change Research: Evaluation and Policy Implications, vol. B, pp. 1173–1176. Elsevier, Amsterdam (1995)
Tertoolen, G., Kreveld, D.V., Verstraten, B.: Psychological resistance against attempts to reduce private car use. Transport. Res.-A 32, 171–181 (1998)
Tetraplan: (2004). O-takst på Svendborgbanen. Effekten af at gøre brugen gratis i januar 2004 (0 fare on the Svendborg line. The Effect of Making the Use Free in January 2004). København: Trafikministeriet
Thøgersen, J.: Forbrugeradfærdsundersøgelser med miljømæssigt sigte. Erfaringer og perspektiver (Consumer Behavior Studies in the Environment Area. Expericences and Perspectives). (Arbejdsrapport No. 1). Copenhagen: Miljøstyrelsen (1995)
Thøgersen, J.: Understanding repetitive travel mode choices in a stable context: a panel study approach. Transport. Res. A: Policy Practice 40, 621–638 (2006)
Thøgersen, J.: Social marketing of alternative transportation modes. In: Gärling, T., Steg, L. (eds.), Threats to the Quality of Urban Life from Car Traffic: Problems, Causes, and Solutions, pp. 367–382. Elsevier, Oxford (2007)
Triandis, H.C.: Interpersonal Behavior. Books/Cole, Monterey (1977)
Van Vugt, M., Van Lange, P.A.M., Meertens, R.M., Joireman, J.A.: How a structural solution to a real-world social dilemma failed: a field experiment on the first carpool lane in Europe. Soc. Psychol. Quart. 59, 364–374 (1996)
Verplanken, B., Aarts, H.: Habit, attitude, and planned behaviour: is habit an empty construct or an interesting case of goal-directed automaticity? Eur. Rev. Soc. Psychol. 10, 101–134 (1999)
Verplanken, B., Aarts, H., Knippenberg, A.v., Knippenberg, C.v.: Attitude versus general habit: antecedents of travel mode choice. J. Appl. Soc. Psychol. 24, 285–300 (1994)
Verplanken, B., Aarts, H., Knippenberg, A.v., Moonen, A.: Habit versus planned behavior: a field experiment. Brit. J. Soc. Psychol. 37, 111–128 (1998)
Acknowledgements
This paper is the outcome of a research project in the framework of Centre for Transport Research on environmental and health Impacts and Policy (TRIP), a multidisciplinary centre based on collaboration among scholars from a number of Danish universities and other research institutions and financed by the Danish Strategic Environmental Research Program. We are grateful to Tommy Gärling and three anonymous reviewers for helpful comments on an earlier version. The authors own the copyright to all included material.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Thøgersen, J., Møller, B. Breaking car use habits: The effectiveness of a free one-month travelcard. Transportation 35, 329–345 (2008). https://doi.org/10.1007/s11116-008-9160-1
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11116-008-9160-1