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Evaluating the impacts of shared automated mobility on-demand services: an activity-based accessibility approach

Author

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  • Bat-hen Nahmias-Biran

    (Ariel University
    Massachusetts Institute of Technology)

  • Jimi B. Oke

    (Massachusetts Institute of Technology
    University of Massachusetts)

  • Nishant Kumar

    (Singapore-ETH Centre)

  • Carlos Lima Azevedo

    (Technical University of Denmark)

  • Moshe Ben-Akiva

    (Massachusetts Institute of Technology)

Abstract

Autonomous vehicle (AV) technologies are under constant improvement with pilot programs now underway in several urban areas worldwide. Modeling and field-testing efforts are demonstrating that shared mobility coupled with AV technology for automated mobility on-demand (AMoD) service may significantly impact levels of service and environmental outcomes in future cities. Given these rapidly emerging developments, there is an urgent need for methods to adequately quantify the economic impacts of new vehicle technologies and future urban mobility policy. In this paper, we show how broader user-centric impacts can be captured by the activity-based accessibility (ABA) measure, which takes advantage of the rich data and outcomes of utility-maximization activity-based models and its interaction with mesoscale agent-based traffic simulation frameworks. Using the SimMobility simulator, we evaluate shared AMoD strategies applied to a Singapore micromodel city testbed. A near-future strategy of exclusive availability of AMoD service in the central business district (CBD), and a further-horizon strategy of the full operation of AMoD city-wide in the absence of other on-demand services, were tested and evaluated. Our results provide insights into the income and accessibility effects on the population under the implementation of shared and automated mobility policies. The outcomes indicate that the city-wide deployment of AMoD results in greater accessibility and network performance. Moreover, the accessibility of low-income individuals is improved relative to that of mid- and high-income individuals. The restriction of AMoD to the CBD along with the operation of other on-demand services, however, provides a certain level of disbenefit to segments of the population in two exceptional cases. The first is to high-income individuals who live in a suburban zone and rely heavily on on-demand services; the second is to mid-income residents that have excellent public transportation coverage with close proximity to the CBD. We further establish the efficacy of the ABA measure, as these findings motivate the need for measuring socioeconomic impacts at the individual level. The work presented here serves as a foundation for policy evaluation in real-world urban models for future mobility paradigms.

Suggested Citation

  • Bat-hen Nahmias-Biran & Jimi B. Oke & Nishant Kumar & Carlos Lima Azevedo & Moshe Ben-Akiva, 2021. "Evaluating the impacts of shared automated mobility on-demand services: an activity-based accessibility approach," Transportation, Springer, vol. 48(4), pages 1613-1638, August.
    • Handle: RePEc:kap:transp:v:48:y:2021:i:4:d:10.1007_s11116-020-10106-y
    DOI: 10.1007/s11116-020-10106-y
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    References listed on IDEAS

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    Cited by:

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    2. van Heerden, Quintin & Karsten, Carike & Holloway, Jenny & Petzer, Engela & Burger, Paul & Mans, Gerbrand, 2022. "Accessibility, affordability, and equity in long-term spatial planning: Perspectives from a developing country," Transport Policy, Elsevier, vol. 120(C), pages 104-119.
    3. Nguyen-Phuoc, Duy Q. & Zhou, Meng & Hong Chua, Ming & Romano Alho, André & Oh, Simon & Seshadri, Ravi & Le, Diem-Trinh, 2023. "Examining the effects of Automated Mobility-on-Demand services on public transport systems using an agent-based simulation approach," Transportation Research Part A: Policy and Practice, Elsevier, vol. 169(C).
    4. Mori, Kentaro & Miwa, Tomio & Abe, Ryosuke & Morikawa, Takayuki, 2022. "Equilibrium analysis of trip demand for autonomous taxi services in Nagoya, Japan," Transportation Research Part A: Policy and Practice, Elsevier, vol. 166(C), pages 476-498.

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