A general framework for modeling shared autonomous vehicles with dynamic network-loading and dynamic ride-sharing application

Levin, Michael W.; Kockelman, Kara M.; Boyles, Stephen D.; Li, Tianxin

doi:10.1016/j.compenvurbsys.2017.04.006

Cited by 196 publications

(109 citation statements)

References 18 publications

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“…89 Taking realistic traffic flows into account, Levin et al reported that empty repositioning trips made by SAVs without dynamic ride-sharing increase congestion and travel time by 3−20%. 92 SAEVs could also drive to remote locations for charging, resulting in higher VMT. Loeb et al estimated that travel to charging stations accounts for about 32% of unoccupied VMT in SAEV fleets.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

A Review on Energy, Environmental, and Sustainability Implications of Connected and Automated Vehicles

Taiebat

Brown

Safford

et al. 2018

Environ. Sci. Technol.

152

118

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Connected and automated vehicles (CAVs) are poised to reshape transportation and mobility by replacing humans as the driver and service provider. While the primary stated motivation for vehicle automation is to improve safety and convenience of road mobility, this transformation also provides a valuable opportunity to improve vehicle energy efficiency and reduce emissions in the transportation sector. Progress in vehicle efficiency and functionality, however, does not necessarily translate to net positive environmental outcomes. Here, we examine the interactions between CAV technology and the environment at four levels of increasing complexity: vehicle, transportation system, urban system, and society. We find that environmental impacts come from CAV-facilitated transformations at all four levels, rather than from CAV technology directly. We anticipate net positive environmental impacts at the vehicle, transportation system, and urban system levels, but expect greater vehicle utilization and shifts in travel patterns at the society level to offset some of these benefits. Focusing on the vehicle-level improvements associated with CAV technology is likely to yield excessively optimistic estimates of environmental benefits. Future research and policy efforts should strive to clarify the extent and possible synergetic effects from a systems level to envisage and address concerns regarding the short- and long-term sustainable adoption of CAV technology.

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Section: Environmental Science and Technologymentioning

confidence: 99%

A Review on Energy, Environmental, and Sustainability Implications of Connected and Automated Vehicles

Taiebat

Brown

Safford

et al. 2018

Environ. Sci. Technol.

152

118

View full text Add to dashboard Cite

show abstract

“…There are only a few papers focusing on the congestion impact of SAVs, e.g., [81], [124], [132], [155], [156]. For example, to investigate mobility impacts of SAVs, Levin et al [124] presented a general event-based framework for simulating the operations of a SAV system with existing traffic models. Considering 100% penetration of SAVs, the authors found that under certain scenarios (e.g., with the option of dynamic ridesharing), a smaller fleet of SAVs performed better than a larger fleet due to lower congestion in the network.…”

Section: A Operation In a Realistic Traffic Environmentmentioning

confidence: 99%

Enhanced Mobility With Connectivity and Automation: A Review of Shared Autonomous Vehicle Systems

Zhao

Malikopoulos

2022

IEEE Intell. Transport. Syst. Mag.

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Shared mobility can provide access to transportation on a custom basis without vehicle ownership. The advent of connected and automated vehicle technologies can further enhance the potential benefits of shared mobility systems. Although the implications of a system with shared autonomous vehicles have been investigated, the research reported in the literature has exhibited contradictory outcomes. In this paper, we present a summary of the research efforts in shared autonomous vehicle systems that have been reported in the literature to date and discuss potential future research directions.

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“…It was found that one SAV could replace about 11 conventional vehicles even though ridesharing is not considered. Levin, Kockelman, Boyles, and Li () developed an event‐based framework to evaluate the benefits of SAVs in a dynamic traffic simulator. A heuristic method was used for dynamic ridesharing.…”

Section: Introductionmentioning

confidence: 99%

Solving the first‐mile ridesharing problem using autonomous vehicles

Chen

Wang

Meng

2019

Computer aided Civil Eng

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Autonomous vehicles (AVs) are paving a way to reshape the operation and management of urban transportation systems by improving travel mobility. In this study, we propose to use AVs for solving the first‐mile (FM) problem that aims to transport passengers from their homes to metro stations. Passengers submit travel requests in advance and a fleet operator dispatches AVs and arranges ridesharing in a rolling horizon framework. The ridesharing is implemented by assigning one AV to serve several requests subject to the vehicle capacity, the maximum travel time, and the accessibility constraints. A mixed integer linear programming (MILP) model is formulated to determine the AV dispatch and ridesharing schemes for the minimum operational costs. Then, another MILP model with the objective of the maximum user satisfaction is formulated for the purpose of comparison. A cluster‐based solution method is designed to deal with the large‐scale FM problem. Extensive numerical experiments are conducted to demonstrate the application of the proposed method. Results show that ridesharing can reduce both required AV fleet size and vehicle traveled miles. The proposed solution method is able to solve the problem efficiently and fulfil the requirement of online computation.

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A general framework for modeling shared autonomous vehicles with dynamic network-loading and dynamic ride-sharing application

Cited by 196 publications

References 18 publications

A Review on Energy, Environmental, and Sustainability Implications of Connected and Automated Vehicles

A Review on Energy, Environmental, and Sustainability Implications of Connected and Automated Vehicles

Enhanced Mobility With Connectivity and Automation: A Review of Shared Autonomous Vehicle Systems

Solving the first‐mile ridesharing problem using autonomous vehicles

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