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      Preprint: Mobility surveys beyond stated preference: Introducing MyTrips, an SP-off-RP survey tool, and results of two case studies

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            Abstract

            When introducing new mobility offers or measures to influence traffic, stated preference (SP) surveys are often used to assess their impact. In SP surveys respondents do not answer questions about their actual behavior but about hypothetical settings. Therefore, answers are often biased. To minimise this hypothetical bias, so-called stated preference-off-revealed preference (SP-off-RP)surveys were developed. They base SP questions on respondents’ revealedbehavior and place unknown scenarios in a familiar context. Until now this method was applied mostly to scenarios investigating the willingness to pay. The application to more complex mode or route choice problems, which require the calculation of routes, has not yet been done. In this paper, the MyTrips survey tool for the collection of SP-off-RP data based on respondents’ actual mobility behavior is presented. SP questions are based on alternatives to typical routes of respondents, which are calculated on the fly with an intermodal router. MyTrips includes a larger survey and collectsmobility diaries for one day representing respondents’ daily routine, calculates alternative routes and creates SP questions based on a Bayesian optimal design. Results from two case studies investigating behavior changes are presented. The first case study investigated the extension of a subway line in Vienna,Austria. The second case study focused on the introduction of micro transit vehicles in a rural setting, replacing infrequent bus services. Results of the two case studies show a difference in response behaviour between SP and RP settings and suggest a reduction of hypothetical bias. For the latter study a Latent Class SP-off-RP model was estimated. It shows that availability and accessibility of public transport are the main influence on the willingness to use it independent of other household characteristics.

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            Author and article information

            Journal
            ScienceOpen Preprints
            ScienceOpen
            28 June 2021
            Affiliations
            [1 ] AIT Austrian Institute of Technology GmbH
            Author notes
            Article
            10.14293/S2199-1006.1.SOR-.PP0T28V.v1
            2bf36349-a975-4a27-bdeb-4cbd9a3ac1fd

            This work has been published open access under Creative Commons Attribution License CC BY 4.0 , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Conditions, terms of use and publishing policy can be found at www.scienceopen.com .

            Funding
            This work is part of the scientific project “SynArea II” supported by the Austrian Research Promotion Agency. 860450

            The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
            Applications,Civil engineering
            Hypothetical bias,Intermodal transportation, Micro transit,Mode Choice modeling,SP-off-RP,Transport data collection

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