Shared autonomous vehicle with pooled service, a modal shift approach

Articles in Press

Document Type : Article

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Civil & Environmental Engineering Department, Tarbiat Modares University, Tehran, Iran

Abstract

Dependence on private cars has led to numerous problems, where AVs could be a potential solution. Pooled service, however, could be a much bigger step towards sustainable transportation. This paper presents a modal shift analysis emphasizing socio-economic, travel characteristics and their interaction for a sample of private car users in Tehran. A stated preference survey was designed in 2021 exclusively for the research purposes, and 491 valid questionnaires were gathered. One of the main contributions is considering the impact of the number of persons in shared autonomous vehicle with pooled service (SAVWPS). Estimation results of discrete choice model reveal that, high-income respondents, owning a personal car and being a man decrease the likelihood of modal shift to SAVWPS. A negative impact is also observed for travel time, travel cost, waiting time and number of persons in SAVWPS. A significant systematic heterogeneity is observed in the interaction effect of travel time and dissatisfied respondents with internet taxis due to the pandemic. Considering this taste variation, a lower travel time in SAVs could increase the modal shift likelihood among these travelers. The findings could help transportation decision-makers identify the factors affecting modal shift to SAVWPS to achieve a more sustainable transportation system.

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Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 10 July 2024

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