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A multi-group analysis of the behavioral intention to ride in autonomous vehicles: evidence from three U.S. metropolitan areas

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Abstract

This paper proposes a well-grounded theoretical model to assess the factors influencing the intention to ride in autonomous vehicles (AVs). The model is based on the Theory of Planned Behavior (TPB), which has been decomposed to account for key components of the Diffusion of Innovation (DoI) theory and extended to include other influential attitudinal components (such as driving-related sensation seeking, safety perceptions, environmental concerns, and affinity to innovativeness). The extent to which these factors are expected to affect the diffusion of AVs uniformly across different urban settings is also examined. Data were collected through stated preference surveys targeting adult residents in three metropolitan statistical areas, Chicago (Illinois), Indianapolis (Indiana), and Phoenix (Arizona). Confirmatory factor analysis was conducted to test the validity and reliability of the components included in the theoretical model, followed by the estimation of a multi-group structural equation model. The findings of the measurement model show that the survey questions are measured equally across the three areas, and hence, the theoretical model is transferrable. The results of the structural model suggest that the synergistic effects between TPB and DoI can better explain the behavioral intention to ride in AVs. It was also found that the effect of the TBP components is similar across various areas; however, this is not the case for the DoI components. In general, the findings reinforce the need for wider testing of AV technology in urban areas coupled with public education campaigns to harvest public awareness and acceptance.

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Availability of data and materials

The data used in this manuscript is not available compelling with IRB Protocols, which restrict access to the principal investigator and the member of the teams listed in the IRB agreement.

Code availability

The code used for the models presented in this manuscript will be available upon request at lllosadar@gmail.com. The model was run using STATA 15 version.

Notes

  1. The indirect effects are calculated by multiplying the different paths associated with each latent variable. For example, the indirect effect of Self-Efficacy on Behavioral Intention, which was found to be similar in all MSAs, can be calculated by multiplying 0.966*0.533 = 0.051, as also shown in Table 6.

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Acknowledgements

The authors would like to acknowledge the Center for Connected and Automated Transportation (CCAT) Region V University Transportation Center (UTC) for supporting this research study. The authors would also like to thank the anonymous reviewers for their constructive feedback that helped us improve the paper.

Funding

This work was partially supported as part of the Center for Connected and Automated Transportation (CCAT) Region V University Transportation Center funded by the U.S. Department of Transportation, Award #69A3551747105. Cost-share was provided by the Indiana Department of Transportation in support of the CCAT UTC.

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Contributions

The authors confirm contribution to the paper as follows: study conception and design: CG; data collection: CG, VDP, and KG; estimation of results: LL, CG and CS; interpretation of results: CG, LL, VDP and KG; draft manuscript preparation: CG, LL, VDP, and KG. All authors reviewed the results and approved the final version of the manuscript.

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Correspondence to Lisa Lorena Losada-Rojas.

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The authors note that there is no conflict of interest regarding this manuscript.

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Appendix

Appendix

See Tables 5 and 6.

Table 5 Descriptive statistics of factors and survey questions
Table 6 Indirect effects on behavioral intention to use AVs

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Gkartzonikas, C., Losada-Rojas, L.L., Christ, S. et al. A multi-group analysis of the behavioral intention to ride in autonomous vehicles: evidence from three U.S. metropolitan areas. Transportation 50, 635–675 (2023). https://doi.org/10.1007/s11116-021-10256-7

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  • DOI: https://doi.org/10.1007/s11116-021-10256-7

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