Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data- [electronic resource]
Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data- [electronic resource]
- Material Type
- 단행본
- 0016935523
- Date and Time of Latest Transaction
- 20240214101943
- ISBN
- 9798380370356
- DDC
- 338.9
- Author
- Liu, Luyu.
- Title/Author
- Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data - [electronic resource]
- Publish Info
- [S.l.]: : The Ohio State University., 2023
- Publish Info
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- Material Info
- 1 online resource(197 p.)
- General Note
- Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
- General Note
- Advisor: Miller, Harvey J.
- 학위논문주기
- Thesis (Ph.D.)--The Ohio State University, 2023.
- Restrictions on Access Note
- This item must not be sold to any third party vendors.
- Abstracts/Etc
- 요약Accessibility is a fundamental measure in public transportation research and policy making; it represents a user's ability to travel and reach destination afforded by a public transit service. Accessibility plays a crucial role in a public transit service's useability, a community's livability, and residents' well-being. Higher accessibility can promote modal shifts from other unsustainable transportation to public transit, which decreases the carbon and air pollution, curbs congestion, and improves social equity and public health. However, many US cities still have major gaps in public transit accessibility and reliability. The issue of inadequate public transportation accessibility and reliability also remains a grave concern for scientific and planning communities: the lack of in-depth, holistic, and reliable understanding of accessibility impedes our ability to make informed and evidence-based decisions during both the planning and operation phases.In this dissertation, I introduce a new research framework - real-time accessibility - to better understand and improve public transit systems with high-resolution real-time geospatial data. The framework utilizes real-time information to assess different dimensions of system performance of public transit services and behaviors of passengers in the systems. I investigate four empirical questions with the framework based on the Central Ohio Transit Authority (COTA) bus system in Columbus, Ohio, a low-frequency bus system in a typical mid-size car-dependent city. First, I study the impact of new dockless scooter sharing services on local public transit systems. While they can significantly improve accessibility, equity and sustainability issues such as uneven distribution, high cost, and low capacity limit the collaboration between public transit and scooters. Second, I study the unreliability of public transit systems and the unrealistic assumptions made by schedule-based and retrospective-based measures used by researchers and planners leveraging new high-resolution public transit data. I introduce a more realistic measure - realizable real-time accessibility - based on the space-time prism concept from time geography. I find that public transit accessibility is highly unreliable, and realizable accessibility is the most conservative and realistic measure, which provides a more robust guide for transit planning. Third, I examine the impacts of short- and longterm disruptions on the accessibility and reliability in the COTA bus system with the same realizable accessibility and unreliability measures introduced in the last paper. I study Ohio State football games and the COVID-19 as examples for short- and long-term disruptions, respectively. The method effectively detects that football games caused system disturbances and COVID-19 had persistent negative impacts on accessibility and reliability. Fourth, in response to the higher frequencies and uncertainties of future disruptions, I introduce accessibility derivative, a measure that calculates the change in system-wide accessibility from an elemental change in the transit system's inputs. The system provides crucial information about the direct impacts of potential disruptions and service cuts on overall accessibility, as well as each route's contribution to accessibility. This dissertation makes conceptual and analytical contributions to offer a more realistic, holistic, and evidence-based approach to evaluate public transit accessibility and reliability. Furthermore, the methods and results can also guide planners and policymakers in evaluating and redesigning transit systems to improve accessibility, service performance, and capacity.
- Subject Added Entry-Topical Term
- Sustainability.
- Subject Added Entry-Topical Term
- Transportation.
- Subject Added Entry-Topical Term
- Geography.
- Subject Added Entry-Topical Term
- Geographic information science.
- Subject Added Entry-Topical Term
- Urban planning.
- Index Term-Uncontrolled
- Accessibility
- Index Term-Uncontrolled
- Public transit
- Index Term-Uncontrolled
- Geospatial data science
- Index Term-Uncontrolled
- Micromobility
- Index Term-Uncontrolled
- Real-time data
- Index Term-Uncontrolled
- Reliability
- Added Entry-Corporate Name
- The Ohio State University Geography
- Host Item Entry
- Dissertations Abstracts International. 85-03B.
- Host Item Entry
- Dissertation Abstract International
- Electronic Location and Access
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202402 2024
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