Bibliografías temáticas / Flex route transit

Literatura académica sobre el tema "Flex route transit"

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Publicado: 22 de junio de 2024

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  3. Capítulos de libros
  4. Actas de conferencias

Artículos de revistas sobre el tema "Flex route transit":

1

Zhang, Jin, Wenquan Li, Guoqing Wang y Jingcai Yu. "Feasibility Study of Transferring Shared Bicycle Users with Commuting Demand to Flex-Route Transit—A Case Study of Nanjing City, China". Sustainability 13, n.º 11 (28 de mayo de 2021): 6067. http://dx.doi.org/10.3390/su13116067.

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Shared bicycle users with commuting purposes generally need to take a traditional public transit and then use the shared bicycle to complete the first/last mile transport. While shared bicycle provides convenient travel for travelers, it also brings a series of problems such as disorderly parking and road occupancy. Therefore, exploring the problem of travel mode shift between shared bicycle and public transit is of significance for improving the traffic environment and increasing the sharing rate of public transit. This paper introduces the flex-route transit system and quantitatively analyzes the rationality and feasibility of using flex-route transit to pick up and drop off shared bicycle users with commuting demand from the temporal perspectives. A flex-route transit route design model is established with the objective of minimizing the sum of vehicle driving time cost and passenger time cost, and the time cost models of the shared bicycle commuting system and the flex-route transit system are constructed, compared, and analyzed to explore the feasibility of flex-route transit picking up or dropping off shared bicycle users under different conditions. Through the subsequent sensitivity analysis, the influence of passenger demand density, fixed station spacing, and travel preference attributed to the two systems are analyzed separately. The results demonstrate that the flex-route transit can efficiently complete the picking up or dropping off for shared bicycle users under certain conditions.
2

Li, Jiayi, Zhaocheng He y Jiaming Zhong. "The Multi-Type Demands Oriented Framework for Flex-Route Transit Design". Sustainability 14, n.º 15 (7 de agosto de 2022): 9727. http://dx.doi.org/10.3390/su14159727.

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Flex-route transit is regarded as the feasible solution to provide flexible service for various demands. To improve the service of flex-route transit, this paper proposes a design framework with the input of multi-type demands. Firstly, according to the multi-feature-based classification method, static stations and dynamic stations are divided by hierarchical clustering algorithm based on historical demands. Secondly, in the two-stage planning method, an offline plan is generated by multi-route design model and route-design-oriented genetic algorithm based on the classified stations and the flexible combination of reserved demands and regular travel patterns. Then, an online plan is adjusted by route modification model and greedy algorithm based on the offline plan and real-time demands. Numerical experiments demonstrate the applicability of flex-route transit in the realistic road network and show that flex-route transit can transport demands more effectively and save nearly 40% of cost compared with traditional transit.
3

Zhang, Jin, Rongrong Guo y Wenquan Li. "Research on Dynamic Scheduling and Route Optimization Strategy of Flex-Route Transit Considering Travel Choice Preference of Passenger". Systems 12, n.º 4 (19 de abril de 2024): 138. http://dx.doi.org/10.3390/systems12040138.

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In this paper, to improve the operational service capability and attractiveness of the flex-route transit system, the real dynamic interaction scenario between passenger travel choice preference and system operation scheme in the post-pandemic era is described and quantified. The key technologies, operation mode, system framework, and interactive events required for dynamic interactive scheduling and route planning of flex-route transit are summarized. According to different choice preferences, the corresponding dynamic interaction scheduling strategies and route mixed integer programming model are proposed. An optimization scheme to improve the service capability of the system is introduced and analyzed. The computational results based on real-world cases show that the proposed strategy can better handle the relationship between requirements of transit system operation and requests of passengers without increasing operating costs, significantly improving the service performance of flex-route transit and the choice rate of passengers. We also find that the introduction of optimization schemes and the adjustment of passenger fares constitute a win-win strategy that benefits both passengers and transit operators.
4

Zheng, Yue, Liangpeng Gao y Wenquan Li. "Vehicle Routing and Scheduling of Flex-Route Transit under a Dynamic Operating Environment". Discrete Dynamics in Nature and Society 2021 (18 de enero de 2021): 1–10. http://dx.doi.org/10.1155/2021/6669567.

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To improve the reliability, responsiveness, and productivity of the flex-route transit service, this paper investigates the vehicle scheduling and routing problem under a dynamic operating environment. First, we discuss the new operating polices after the introduction of intelligent transportation systems (ITSs), including automatic vehicle location (AVL) system, mobile data terminal (MDT), and computer-aided dispatch (CAD) system. Second, a mixed integer programming (MIP) formulation is employed to solve the offline routing problem. Third, an online scheduling scheme is presented to tackle different dynamic events, such as dynamic requests, travel time fluctuations, cancellations of requests, and customer no-shows. Finally, simulation experiments based on a real-life flex-route transit service are conducted to assess the influence of different dynamic events. The results demonstrate that the proposed scheduling scheme is reliable for coping with various dynamic events, and our findings can be used to guide the policy making of flex-route transit services.
5

Fu, Liping. "Planning and Design of Flex-Route Transit Services". Transportation Research Record: Journal of the Transportation Research Board 1791, n.º 1 (enero de 2002): 59–66. http://dx.doi.org/10.3141/1791-09.

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A theoretical investigation is presented of various issues involved in the planning and design of flex-route transit services. An analytical model is proposed for an idealized operating environment with the objective of determining the optimal slack time that should be allocated to a flexroute segment. The optimization objective is defined to minimize total operator and user cost, which enables a systematic examination of complex interactions among the system parameters. An equation is derived for the relationship between the number of feasible deviations and various system parameters such as slack time, zone size, and dwell time. Subsequent analysis shows that the analytical model is elaborate enough to provide substantial insights into various issues that may arise in designing a flex-route service. A simulation analysis is conducted to validate some of the conclusions drawn from the analytical model and to further analyze the implications of stochastic variation in passenger demand.
6

Farwell, Randall G. y Eric Marx. "Planning, Implementation, and Evaluation of OmniRide Demand-Driven Transit Operations: Feeder and Flex-Route Services". Transportation Research Record: Journal of the Transportation Research Board 1557, n.º 1 (enero de 1996): 1–9. http://dx.doi.org/10.1177/0361198196155700101.

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Information about the Potomac and Rappahannock Transportation Commission operational test is presented. The test focuses on service planning for the local flex-route transit services and the flag-stop commuter-rail feeder services, as well as their start-ups. Although the intelligent transportation system (ITS) operational test involves the application of automated vehicle location and real-time order-taking, scheduling, and dispatching of software, the planning and start-up operations of the non-ITS-enhanced phase of the flex-route and feeder services are addressed.
7

Liu, Xiaohan, Xiaobo Qu y Xiaolei Ma. "Improving flex-route transit services with modular autonomous vehicles". Transportation Research Part E: Logistics and Transportation Review 149 (mayo de 2021): 102331. http://dx.doi.org/10.1016/j.tre.2021.102331.

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Zheng, Yue, Wenquan Li y Feng Qiu. "A slack arrival strategy to promote flex-route transit services". Transportation Research Part C: Emerging Technologies 92 (julio de 2018): 442–55. http://dx.doi.org/10.1016/j.trc.2018.05.015.

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HU, Di y Wenzhou JIN. "Flex-route demand response transit scheduling based on station optimization". Journal of Shenzhen University Science and Engineering 39, n.º 2 (1 de marzo de 2022): 209–15. http://dx.doi.org/10.3724/sp.j.1249.2022.02209.

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10

Qiu, Feng, Wenquan Li y Ali Haghani. "A methodology for choosing between fixed-route and flex-route policies for transit services". Journal of Advanced Transportation 49, n.º 3 (1 de octubre de 2014): 496–509. http://dx.doi.org/10.1002/atr.1289.

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Artículos de revistas

Tesis sobre el tema "Flex route transit":

1

Shahin, Reza. "Incorporating Ad Hoc Stops in Public Transport : A Study on Flex-Route Transit". Electronic Thesis or Diss., Université Gustave Eiffel, 2024. http://www.theses.fr/2024UEFL2004.

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Ces dernières années, on a assisté à une tendance croissante à l'adoption de solutions de transport flexibles telles que le transport à la demande (DRT), principalement en raison du confort accru qu'elles offrent aux passagers. Cependant, cette flexibilité s’accompagne d’importants coûts économiques. Par conséquent, les autorités de transport explorent actuellement des méthodes pour augmenter la flexibilité des transports publics conventionnels (CPT), qui sont plus conservateurs que le DRT. Cela amène à l'importance du Flex-Route Transit (FRT), un système innovant fusionnant les avantages du DRT et du CPT. Dans cette thèse, nous menons une enquête exhaustive sur le FRT. Plus précisément, nous examinons la littérature académique pertinente, mettant en évidence les lacunes existantes dans la recherche. Ensuite, nous formulons un modèle de programmation linéaire en nombres entiers mixtes (MILP) étendant l'état de l'art pour inclure des caractéristiques du problème précédemment négligées, et nous le complétons par un ensemble d'inégalités valides pour améliorer sa relaxation linéaire. Nous introduisons également un algorithme heuristique pour obtenir une solution réalisable et employons une technique de démarrage à chaud pour booster la solution du MILP. Par la suite, une analyse de sensibilité est réalisée sur la base d'un plan factoriel complet. Ici, nous évaluons les niveaux de saturation du système selon divers scénarios de demande, en nous concentrant sur les temps d'attente prolongés pour les passagers. Dans le dernier chapitre de contribution, un modèle MILP stochastique pour le FRT est proposé, dans lequel certains paramètres initiaux du MILP de base sont élevés au statut de variable. Nous concluons la thèse en décrivant des pistes prospectives pour de recherches futures
In recent years, there has been an ascending trend towards the adoption of flexible transit solutions like Demand Responsive Transit (DRT), primarily due to the enhanced convenience they offer to passengers. However, this flexibility comes with an associated economic burden. Consequently, transport authorities are presently exploring methods to augment the flexibility of Conventional Public Transport (CPT), which is more conservative compared to DRT. This gives rise to the significance of Flex-Route Transit (FRT), an innovative system amalgamating the benefits of both DRT and CPT. In the doctoral dissertation presented here, we conduct an exhaustive investigation of FRT frameworks. Specifically, we scrutinize pertinent academic literature, highlighting extant research lacunae. Then, we formulate a Mixed Integer Linear Programming (MILP) model extending the state of the art to include previously neglected problem features, and we supplement it by a set of valid inequalities to enhance its linear relaxation. We also introduce a heuristic algorithm to procure a feasible solution and employ a warm start technique to boost the MILP solution. Subsequently, a comprehensive full factorial experimental design sensitivity analysis is carried out. Here, we evaluate the system's saturation levels under various demand scenarios, focusing on the elongated wait times for passengers. In the final contribution chapter, a stochastic MILP model for the FRT is proposed, wherein certain initial parameters of the base MILP are elevated to variable status. We conclude the dissertation by outlining prospective avenues for future research
2

Alshalalfah, Baha Waheed Yousef. "Planning, Design and Scheduling of Flex-route Transit Service". Thesis, 2009. http://hdl.handle.net/1807/24302.

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The rapid expansion of low-density suburban areas in North America has led to new travel patterns that require transit services to be more flexible. Flex-Route transit service, which combines fixed-route transit service with elements of demand-responsive transit service, has emerged as a viable transit option to address the travel needs of the residents of these areas. Existing literature in this field, however, is limited and lacks any comprehensive analysis of Flex-Route planning, design and scheduling. This research aims at exploring Flex-Route transit service to provide detailed guidelines for the planning and design of the service, as well as developing a new scheduling system for this type of unique service. Accordingly, the objectives of this research are: assessing the practicality of Flex-Route transit service in serving low-density suburban areas; identifying essential Flex-Route planning steps and design parameters; determining the feasibility and cost of replacing fixed-route transit with Flex-Route service; and developing a Flex-Route-specific dynamic scheduling system that relies on recent developments in computer and communication technologies. In this regard, we develop an analytical model that addresses several design parameters and provide a detailed analysis that includes, among other parameters, finding optimal values for Flex-Route service area and slack time. Furthermore, the analytical model includes a feasibility and cost analysis that estimates the cost incurred by several stakeholders if Flex-Route service is chosen to replace fixed-route service. The core of the scheduling system is a new developed algorithm – the Constrained-Insertion Algorithm- that exploits the powerful search techniques of Constraint Programming. The scheduling system can handle the daily operations of Flex-Route transit services; it accepts daily (or dynamic) inputs and, in minimal time, produces very cost-effective and reliable schedules. Moreover, the scheduling system has the ability to be used as simulation tool to allow transit operators to assess the feasibility and performance of proposed Flex-Route transit services before implementation. The applicability of the analytical model as well as the performance of the scheduling system were subsequently evaluated and validated through process that included testing on a case study in the City of Oakville, Canada.

Capítulos de libros sobre el tema "Flex route transit":

1

Shen, Jin-xing, Yu-han Zhou, Ya-nan Liu y Feng Qiu. "A Service-Based Fare Policy for Flex-Route Transit Services". En Green Intelligent Transportation Systems, 87–95. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0302-9_9.

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Actas de conferencias sobre el tema "Flex route transit":

1

Sun, Chunyang, Zike Shao, Yuxiang Shi y Yue Zheng. "Comparison and selection of feeder transit between flex-route transit and fixed-route transit". En International Conference on Smart Transportation and City Engineering, editado por Zhengliang Li, Xiaoyan Chen, Kaichen Yan, Fengjie Cen, Liyuan Peng y Nan Lin. SPIE, 2021. http://dx.doi.org/10.1117/12.2614358.

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Qiu, Feng, Wenquan Li y Chengchuan An. "A Google Maps-Based Flex-Route Transit Scheduling System". En 14th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413623.025.

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Zheng, Yue y Wenquan Li. "Flex-Route Transit Service with Different Degree of Dynamism". En 19th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482292.377.

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Sun, Chunyang, Wenquan Li, Zike Shao y Yue Zheng. "A New Strategy to Optimize the Flex-Route Transit Service". En 17th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784480915.368.

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Shahin, Reza, Pierre Hosteins, Paola Pellegrini y Pierre-Olivier Vandanjon. "A full factorial sensitivity analysis for a capacitated Flex-Route Transit system". En 2023 8th International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS). IEEE, 2023. http://dx.doi.org/10.1109/mt-its56129.2023.10241378.

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6

Li, Weixin, Wenquan Li y Weicen Ling. "A Methodology for Vehicle Routing Optimization of Flex-Route Transit with Time Windows". En 19th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482292.131.

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Shao, Zike, Chunyang Sun y Ya Liu. "Discussion about cycle length, scheduling algorithm, and headways for flex-route feeder transit". En International Conference on Smart Transportation and City Engineering (STCE 2022), editado por Miroslava Mikusova. SPIE, 2022. http://dx.doi.org/10.1117/12.2657954.

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Sun, Zhichuan, Yang Luo, Junye Li, Wei Li, Jingzhi Zhang, Zhengjiang Zhang y Jie Wu. "Numerical Investigation of Flow Boiling in a Manifold Microchannel Heat Sink With Conjugate Heat Transfer". En ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-4042.

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Abstract The manifold microchannel heat sink receives an increasing number of attention lately due to its high heat flux dissipation. Numerical investigation of boiling phenomena in manifold microchannel (MMC) heat sinks remains a challenge due to the complexity of fluid route and the limitation of numerical accuracy. In this study, a computational fluid dynamics (CFD) approach including subcooled two-phase flow boiling process and conjugate heat transfer effect is performed using a MMC unit cell model. Different from steady-state single phase prediction in MMC heat sink, this type of modeling allows for the transient simulation for two-phase interface evolution during the boiling process. A validation case is conducted to validate the heat transfer phenomenon among three phases. Besides, this model is used for the assessment of the manifold dimensions in terms of inlet and outlet widths at the mass flux of 1300 kg/m2·s. With different ratios of inlet-to-outlet area, the thermal resistances remain nearly stable.
9

Segall, A. E. "Thermoelastic Stresses in Thick-Walled Vessels Under an Arbitrary Thermal Transient via the Inverse Route". En ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71054.

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A common threat to thick-walled vessels and pipes is thermal shock from operational steady-state or transient thermoelastic stresses. As such, boundary conditions must be known or determined in order to reveal the underlying thermal state. For direct problems where all boundary conditions are known, the procedure is relatively straightforward and mathematically tractable as shown by recent studies. Although more practical from a measurement standpoint, the inverse problem where boundary conditions must be determined from remotely determined temperature and/or flux data is ill-posed and inherently sensitive to errors in the data. As a result, the inverse route is rarely used to determine thermal-stresses. Moreover, most analytical solutions to the inverse problem rely on a host of assumptions that usually restrict their utility to timeframes before the thermal wave reaches the natural boundaries of the structure. To help offset these limitations and at the same time solve for the useful case of a thick-walled cylinder exposed to thermal loading on the ID, the inverse problem was solved using a least-squares determination of polynomial coefficients based on a generalized direct-solution to the Heat Equation. Once the inverse problem was solved in this fashion and the unknown boundary-condition on the ID determined, the resulting polynomial was used with the generalized direct solution to estimate the internal temperature and stress distributions as a function of time and radial position. For a thick-walled cylinder under an internal transient with external convection, excellent agreement was seen with various measured temperature histories. Given the versatility of the polynomial solutions advocated, the method appears well suited for many thermal scenarios provided the analysis is restricted to the time interval used to determine the polynomial and the thermophysical properties that do not vary with temperature.
10

Ho, Clifford K. "Stochastic Modeling of Chemical Transport Through Human Skin". En ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42907.

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A probabilistic, transient, three-phase model of chemical transport through human skin has been developed to assess the relative importance of uncertain parameters and processes during chemical exposure assessments and transdermal drug delivery. Penetration routes through the skin that were modeled include the following: (1) intercellular diffusion through the multiphase stratum corneum; (2) aqueous-phase diffusion through sweat ducts; and (3) oil-phase diffusion through hair follicles. Uncertainty distributions were developed for the model parameters, and a Monte Carlo analysis was performed to simulate probability distributions of mass fluxes through each of the routes for a hypothetical scenario of chemical transport through the skin. At early times (60 seconds), the sweat ducts provided a significant amount of simulated mass flux into the bloodstream. At longer times (1 hour), diffusion through the stratum corneum became important because of its relatively large surface area. Sensitivity analyses using stepwise linear regression were also performed to identify model parameters that were most important to the simulated mass fluxes at different times.

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