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Shared Autonomous Vehicles as Last-Mile Public Transport of Metro Trips

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  • Zhiwei Liu

    (School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China
    Current address: Science and Education Building 1208, Wuhan Polytechnic University, 68 Xuefu South Road, Changqing Garden, Wuhan 430023, China.)

  • Jianrong Liu

    (School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

Abstract

The “last-mile problem” of public transportation is one of the main obstacles affecting travelers who choose to utilize public transport. Although autonomous vehicles (AVs) have made much progress, they have not been officially put into commercial use. This paper adopts stated preference experiments to explore the impact of shared AVs on the last-mile travel behavior of metro users and takes Wuhan as an example for case analysis. First of all, this paper establishes a structural equation model (SEM) based on the theory of planned behavior to explore latent psychological variables, including travelers’ attitudes (ATTs), subjective norms (SNs), perceived behavior control (PBC), and behavioral intention of use (BIU) toward AVs. These latent psychological variables are incorporated into the latent class (LC) logit model to establish a hybrid model with which to study the factors and degree of influence on the travel mode choices of travelers for the last mile of their metro trips. The results show that travelers have preference heterogeneity for the travel mode choices for the last mile of metro trips. Through the analysis of LCs, education, career, and income significantly impact the classification of LCs. The latent psychological variables towards AVs have a significant impact on the travel behavior of respondents, but the impacts vary among different segments. Elastic analysis results illustrate that a 1% increase in the travel cost for shared AVs in segment 1 leads to a 7.598% decrease in the choice probability of using a shared AV. Respondents from different segments vary significantly in their willingness to pay for their usage, and the value of travel time for high-income groups is relatively higher.

Suggested Citation

  • Zhiwei Liu & Jianrong Liu, 2023. "Shared Autonomous Vehicles as Last-Mile Public Transport of Metro Trips," Sustainability, MDPI, vol. 15(19), pages 1-15, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:19:p:14594-:d:1255635
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    References listed on IDEAS

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