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Reshaping Urban Transportation With Micromobility
Reshaping Urban Transportation With Micromobility
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152756
- ISBN
- 9798383728383
- DDC
- 385
- 저자명
- Fan, Zhufeng.
- 서명/저자
- Reshaping Urban Transportation With Micromobility
- 발행사항
- [Sl] : Carnegie Mellon University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 163 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Harper, Corey.
- 학위논문주기
- Thesis (Ph.D.)--Carnegie Mellon University, 2024.
- 초록/해제
- 요약Micromobility (e.g., bikes and e-scooters) has become a vital component in modern cities in recent years, representing significant opportunities to reshape urban transportation systems. This dissertation develops methods and frameworks to estimate the impacts, improve equity, and improve operations of micromobility modes in urban areas. Three research questions are answered in this dissertation: 1) What are the upper bound potential for micromobility to replace short vehicle trips in an urban area and the resulting impacts to traffic congestion and environments; 2) How do transportation planner preferences for satisfying equity and demand objectives affect bike share station siting decisions; 3) What extra information can social media data provide for bikeshare demand predictions.Chapter 2 investigates the effects of micromobility to replace short private vehicles trips (0-3 miles). This study uses Seattle as a case study and estimates that up to 18% of short car trips could be replaced by micromobility. A static traffic assignment model is developed to simulate and compare the results of peak hour traffic under a base case scenario (2014 traffic conditions) to scenarios where a portion of short car trips are substituted by micromobility. Results indicate that micromobility could reduce congestion on heavily congested corridors and wide-scale bike lane deployment can maximize congestion benefits, but the impacts to energy use and emissions are disproportionately low and other measures (e.g., vehicle electrification) are needed to meet climate change emissions targets.Chapter 3 explores the design and equity implications of bike share systems. Shared bikes represent a significant opportunity to improve transit accessibility but have issues with low-density and inequitable distribution of services, typically in low-income areas. This study develops a method to estimate public transit service supply within a region with micromobility using bus schedule and bike station location data. A bi-objective optimization model is developed and applied to Pittsburgh, PA to illuminate how stakeholder preferences towards equity (i.e., improving mobility access for disadvantaged communities) impacts the design of docked bike share systems. Results indicate that bike share systems can significantly improve public transit accessibility within a region, particularly in neighborhoods that have bike stations deployed. Emphasizing equity enables disadvantaged communities to have greater access to public transit, while balancing equity and demand can help bridge transportation disparities among population groups.Chapter 4 examines the potential of social media data to bikeshare demand predictions, using the bikeshare program in Pittsburgh as a case study. Numerical feature representations are extracted from Twitter messages using state-of-the-art large language models and follow up with a time-series regressor for demand prediction. Although sentiment features extracted from Twitter messages marginally improve prediction performance, the usability of text embeddings of Twitter data is limited due to noise and irrelevance compared to traditional data sources. Finetuning large language models can reduce the gap between social media features and actual demand, but future discovery is still needed to maximize the overall utilization of social media data in micromobility research.This dissertation deepens the understanding of micromobility modes and assists policymakers in more effectively incorporating micromobility into urban transportation systems. Together with advancements in other transportation modes, micromobility is aspired to improve the overall quality of urban life by enhancing accessibility, equity, and convenience in urban transportation in the future.
- 일반주제명
- Transportation
- 일반주제명
- Urban planning
- 키워드
- Equity
- 키워드
- Micromobility
- 기타저자
- Carnegie Mellon University Civil and Environmental Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152756
■006m o d
■007cr#unu||||||||
■020 ▼a9798383728383
■035 ▼a(MiAaPQ)AAI31555817
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a385
■1001 ▼aFan, Zhufeng.
■24510▼aReshaping Urban Transportation With Micromobility
■260 ▼a[Sl]▼bCarnegie Mellon University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a163 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Harper, Corey.
■5021 ▼aThesis (Ph.D.)--Carnegie Mellon University, 2024.
■520 ▼aMicromobility (e.g., bikes and e-scooters) has become a vital component in modern cities in recent years, representing significant opportunities to reshape urban transportation systems. This dissertation develops methods and frameworks to estimate the impacts, improve equity, and improve operations of micromobility modes in urban areas. Three research questions are answered in this dissertation: 1) What are the upper bound potential for micromobility to replace short vehicle trips in an urban area and the resulting impacts to traffic congestion and environments; 2) How do transportation planner preferences for satisfying equity and demand objectives affect bike share station siting decisions; 3) What extra information can social media data provide for bikeshare demand predictions.Chapter 2 investigates the effects of micromobility to replace short private vehicles trips (0-3 miles). This study uses Seattle as a case study and estimates that up to 18% of short car trips could be replaced by micromobility. A static traffic assignment model is developed to simulate and compare the results of peak hour traffic under a base case scenario (2014 traffic conditions) to scenarios where a portion of short car trips are substituted by micromobility. Results indicate that micromobility could reduce congestion on heavily congested corridors and wide-scale bike lane deployment can maximize congestion benefits, but the impacts to energy use and emissions are disproportionately low and other measures (e.g., vehicle electrification) are needed to meet climate change emissions targets.Chapter 3 explores the design and equity implications of bike share systems. Shared bikes represent a significant opportunity to improve transit accessibility but have issues with low-density and inequitable distribution of services, typically in low-income areas. This study develops a method to estimate public transit service supply within a region with micromobility using bus schedule and bike station location data. A bi-objective optimization model is developed and applied to Pittsburgh, PA to illuminate how stakeholder preferences towards equity (i.e., improving mobility access for disadvantaged communities) impacts the design of docked bike share systems. Results indicate that bike share systems can significantly improve public transit accessibility within a region, particularly in neighborhoods that have bike stations deployed. Emphasizing equity enables disadvantaged communities to have greater access to public transit, while balancing equity and demand can help bridge transportation disparities among population groups.Chapter 4 examines the potential of social media data to bikeshare demand predictions, using the bikeshare program in Pittsburgh as a case study. Numerical feature representations are extracted from Twitter messages using state-of-the-art large language models and follow up with a time-series regressor for demand prediction. Although sentiment features extracted from Twitter messages marginally improve prediction performance, the usability of text embeddings of Twitter data is limited due to noise and irrelevance compared to traditional data sources. Finetuning large language models can reduce the gap between social media features and actual demand, but future discovery is still needed to maximize the overall utilization of social media data in micromobility research.This dissertation deepens the understanding of micromobility modes and assists policymakers in more effectively incorporating micromobility into urban transportation systems. Together with advancements in other transportation modes, micromobility is aspired to improve the overall quality of urban life by enhancing accessibility, equity, and convenience in urban transportation in the future.
■590 ▼aSchool code: 0041.
■650 4▼aTransportation
■650 4▼aUrban planning
■650 4▼aEnvironmental engineering
■653 ▼aEquity
■653 ▼aMicromobility
■653 ▼aUrban transportation systems
■653 ▼aTraffic congestion
■690 ▼a0543
■690 ▼a0709
■690 ▼a0775
■690 ▼a0999
■71020▼aCarnegie Mellon University▼bCivil and Environmental Engineering.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0041
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163810▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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