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Author: Zhanhong Cheng Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
"The metro is indispensable for the urban transportation system. As the world enters the era of informatization and digitalization, data generated from smart card fare collection systems (smart card data) have played an important role in the planning and operation of metro systems. A large body of research uses smart card data to understand passenger travel behavior in metro systems; it has been found that individual mobility in metro systems is highly regular with interpretable patterns. Besides, smart card data have also been extensively used in assisting the operation and control of metro systems, such as inferring trip origins/destinations and forecasting passenger demand. However, a lack in existing research is the connection between the above two aspects---how to use the unique travel behavior characteristics of metro passengers to establish better data-driven applications. To fill this gap, this thesis aims to develop travel-behavior-based inference and forecasting models in metro systems. The three contributions of this thesis, enclosed in three scientific papers, are (1) trip destination inference, (2) real-time boarding demand forecasting, and (3) real-time origin-destination (OD) matrices forecasting. All models developed in the thesis are tested by real-world smart card data from Guangzhou, China. First, this thesis develops a probabilistic topic model to infer trip destination from tap-in only smart card system. The probabilistic topic model is learned from passengers' historical travel behavior and can predict the most likely destination of a trip given the origin and the departure time. Complementing existing trip-chain-based destination inference methods, the proposed model is particularly useful for isolated trips where conventional methods fail. Besides destination inference, latent topics learned by the probabilistic model can be used to analyze passengers' travel behavior patterns. Second, this thesis aims to incorporate travel behavior regularity into passenger boarding demand/flow forecasting. Utilizing the strong regularity rooted in individuals' travel behavior, a new concept named ``returning flow'' is proposed to capture the generative mechanism of boarding flow. The returning flow is highly correlated to the boarding flow and can be used as a covariate in a time series model to improve the boarding flow forecasting. Extensive experiments show the effectiveness of using the travel behavioral feature boarding flow forecasting. The Last part of this thesis addresses the real-time OD matrices forecasting problem in metro systems. Using the low-rank property of OD data, the forecasting is formulated into a low-rank vector autoregression (VAR) problem and is solved by dynamic mode decomposition (DMD). Next, a forgetting ratio is introduced to exponentially reduce the weights for historical data. Moreover, an online update algorithm is developed to update the model efficiently without storing historical data or retraining. Experiments show the proposed model significantly outperforms baseline models in forecasting both OD matrices and boarding flow. In summary, this thesis uses travel behavioral characteristics to improve inference and forecasting models in metro systems. The proposed models and solutions are beneficial to the intelligent operation of metro systems. The three tasks of destination inference, boarding flow forecasting, and OD matrices forecasting correspond to individual-level, station-level, and-network level applications, respectively. By these three levels, this thesis demonstrates the considerable potential of using travel behavior in various metro applications"--
Author: Zhanhong Cheng Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
"The metro is indispensable for the urban transportation system. As the world enters the era of informatization and digitalization, data generated from smart card fare collection systems (smart card data) have played an important role in the planning and operation of metro systems. A large body of research uses smart card data to understand passenger travel behavior in metro systems; it has been found that individual mobility in metro systems is highly regular with interpretable patterns. Besides, smart card data have also been extensively used in assisting the operation and control of metro systems, such as inferring trip origins/destinations and forecasting passenger demand. However, a lack in existing research is the connection between the above two aspects---how to use the unique travel behavior characteristics of metro passengers to establish better data-driven applications. To fill this gap, this thesis aims to develop travel-behavior-based inference and forecasting models in metro systems. The three contributions of this thesis, enclosed in three scientific papers, are (1) trip destination inference, (2) real-time boarding demand forecasting, and (3) real-time origin-destination (OD) matrices forecasting. All models developed in the thesis are tested by real-world smart card data from Guangzhou, China. First, this thesis develops a probabilistic topic model to infer trip destination from tap-in only smart card system. The probabilistic topic model is learned from passengers' historical travel behavior and can predict the most likely destination of a trip given the origin and the departure time. Complementing existing trip-chain-based destination inference methods, the proposed model is particularly useful for isolated trips where conventional methods fail. Besides destination inference, latent topics learned by the probabilistic model can be used to analyze passengers' travel behavior patterns. Second, this thesis aims to incorporate travel behavior regularity into passenger boarding demand/flow forecasting. Utilizing the strong regularity rooted in individuals' travel behavior, a new concept named ``returning flow'' is proposed to capture the generative mechanism of boarding flow. The returning flow is highly correlated to the boarding flow and can be used as a covariate in a time series model to improve the boarding flow forecasting. Extensive experiments show the effectiveness of using the travel behavioral feature boarding flow forecasting. The Last part of this thesis addresses the real-time OD matrices forecasting problem in metro systems. Using the low-rank property of OD data, the forecasting is formulated into a low-rank vector autoregression (VAR) problem and is solved by dynamic mode decomposition (DMD). Next, a forgetting ratio is introduced to exponentially reduce the weights for historical data. Moreover, an online update algorithm is developed to update the model efficiently without storing historical data or retraining. Experiments show the proposed model significantly outperforms baseline models in forecasting both OD matrices and boarding flow. In summary, this thesis uses travel behavioral characteristics to improve inference and forecasting models in metro systems. The proposed models and solutions are beneficial to the intelligent operation of metro systems. The three tasks of destination inference, boarding flow forecasting, and OD matrices forecasting correspond to individual-level, station-level, and-network level applications, respectively. By these three levels, this thesis demonstrates the considerable potential of using travel behavior in various metro applications"--
Author: National Research Council (U.S.). Committee for Determination of the State of the Practice in Metropolitan Area Travel Forecasting Publisher: Transportation Research Board ISBN: 0309104173 Category : Business & Economics Languages : en Pages : 147
Book Description
TRB Special Report 288, Metropolitan Travel Forecasting: Current Practice and Future Direction, examines metropolitan travel forecasting models that provide public officials with information to inform decisions on major transportation system investments and policies. The report explores what improvements may be needed to the models and how federal, state, and local agencies can achieve them. According to the committee that produced the report, travel forecasting models in current use are not adequate for many of today's necessary planning and regulatory uses.
Author: Jinhua Zhao Publisher: ISBN: Category : Languages : en Pages : 248
Book Description
(Cont.) by presenting two case studies both in the context of the Chicago Transit Authority. One study proposes an enhanced method of inferring the rail trip OD matrix from an origin-only AFC system to replace the routine passenger survey. The proposed algorithm takes advantage of the pattern of a person's consecutive transit trip segments. In particular the study examines the rail-to-bus case (which is ignored by prior studies) by integrating AFC and AVL data and utilizing GIS and DBMS technologies. A software tool is developed to facilitate the implementation of the algorithm. The other study is of rail path choice, which employs the Logit and Mixed Logit models to examine revealed public transit riders' travel behavior based on the inferred OD matrix and the transit network attributes. This study is based on two data sources: the rail trip OD matrix inferred in the first case study and the attributes of alternative paths calculated from a network representation in Trans CAD. This study demonstrates that a rigorous traveler behavior analysis can be performed based on the data source from ADC systems. Both cases illustrate the potential as well as the difficulty of utilizing these systems and more importantly demonstrate that at relatively low marginal cost, ADC systems can provide transit agencies with a rich information source to support decision making. The impact of a new data collection strategy ...
Author: Feras El Zarwi Publisher: ISBN: Category : Languages : en Pages : 119
Book Description
The transportation system is undergoing major technological and infrastructural changes, such as the introduction of autonomous vehicles, high speed rail, carsharing, ridesharing, flying cars, drones, and other app-driven on-demand services. While the changes are imminent, the impact on travel behavior is uncertain, as is the role of policy in shaping the future. Literature shows that even under the most optimistic scenarios, society's environmental goals cannot be met by technology, operations, and energy system improvements only - behavior change is needed. Behavior change does not occur instantaneously, but is rather a gradual process that requires years and even generations to yield the desired outcomes. That is why we need to nudge and guide trends of travel behavior over time in this era of transformative mobility. We should focus on influencing long-range trends of travel behavior to be more sustainable and multimodal via effective policies and investment strategies. Hence, there is a need for developing policy analysis tools that focus on modeling the evolution of trends of travel behavior in response to upcoming transportation services and technologies. Over time, travel choices, attitudes, and social norms will result in changes in lifestyles and travel behavior. That is why understanding dynamic changes of lifestyles and behavior in this era of transformative mobility is central to modeling and influencing trends of travel behavior. Modeling behavioral dynamics and trends is key to assessing how policies and investment strategies can transform cities to provide a higher level of connectivity, attain significant reductions in congestion levels, encourage multimodality, improve economic and environmental health, and ensure equity. This dissertation focuses on addressing limitations of activity-based travel demand models in capturing and predicting trends of travel behavior. Activity-based travel demand models are the commonly-used approach by metropolitan planning agencies to predict 20-30 year forecasts. These include traffic volumes, transit ridership, biking and walking market shares that are the result of large scale transportation investments and policy decisions. Currently, travel demand models are not equipped with a framework that predicts long-range trends in travel behavior for two main reasons. First, they do not entail a mechanism that projects membership and market share of new modes of transport into the future (Uber, autonomous vehicles, carsharing services, etc). Second, they lack a dynamic framework that could enable them to model and forecast changes in lifestyles and transport modality styles. Modeling the evolution and dynamic changes of behavior, modality styles and lifestyles in response to infrastructural and technological investments is key to understanding and predicting trends of travel behavior, car ownership levels, vehicle miles traveled (VMT), and travel mode choice. Hence, we need to integrate a methodological framework into current travel demand models to better understand and predict the impact of upcoming transportation services and technologies, which will be prevalent in 20-30 years. The objectives of this dissertation are to model the dynamics of lifestyles and travel behavior through: " Developing a disaggregate, dynamic discrete choice framework that models and predicts long-range trends of travel behavior, and accounts for upcoming technological and infrastructural changes." Testing the proposed framework to assess its methodological flexibility and robustness." Empirically highlighting the value of the framework to transportation policy and practice. The proposed disaggregate, dynamic discrete choice framework in this dissertation addresses two key limitations of existing travel demand models, and in particular: (1) dynamic, disaggregate models of technology and service adoption, and (2) models that capture how lifestyles, preferences and transport modality styles evolve dynamically over time. This dissertation brings together theories and techniques from econometrics (discrete choice analysis), machine learning (hidden Markov models), statistical learning (Expectation Maximization algorithm), and the technology diffusion literature (adoption styles). Throughout this dissertation we develop, estimate, apply and test the building blocks of the proposed disaggregate, dynamic discrete choice framework. The two key developed components of the framework are defined below. First, a discrete choice framework for modeling and forecasting the adoption and diffusion of new transportation services. A disaggregate technology adoption model was developed since models of this type can: (1) be integrated with current activity-based travel demand models; and (2) account for the spatial/network effect of the new technology to understand and quantify how the size of the network, governed by the new technology, influences the adoption behavior. We build on the formulation of discrete mixture models and specifically dynamic latent class choice models, which were integrated with a network effect model. We employed a confirmatory approach to estimate our latent class choice model based on findings from the technology diffusion literature that focus on defining distinct types of adopters such as innovator/early adopters and imitators. Latent class choice models allow for heterogeneity in the utility of adoption for the various market segments i.e. innovators/early adopters, imitators and non-adopters. We make use of revealed preference (RP) time series data from a one-way carsharing system in a major city in the United States to estimate model parameters. The data entails a complete set of member enrollment for the carsharing service for a time period of 2.5 years after being launched. Consistent with the technology diffusion literature, our model identifies three latent classes whose utility of adoption have a well-defined set of preferences that are statistically significant and behaviorally consistent. The technology adoption model predicts the probability that a certain individual will adopt the service at a certain time period, and is explained by social influences, network effect, socio-demographics and level-of-service attributes. Finally, the model was calibrated and then used to forecast adoption of the carsharing system for potential investment strategy scenarios. A couple of takeaways from the adoption forecasts were: (1) highest expected increase in the monthly number of adopters arises by establishing a relationship with a major technology firm and placing a new station/pod for the carsharing system outside that technology firm; and (2) no significant difference in the expected number of monthly adopters for the downtown region will exist between having a station or on-street parking. The second component in the proposed framework entails modeling and forecasting the evolution of preferences, lifestyles and transport modality styles over time. Literature suggests that preferences, as denoted by taste parameters and consideration sets in the context of utility-maximizing behavior, may evolve over time in response to changes in demographic and situational variables, psychological, sociological and biological constructs, and available alternatives and their attributes. However, existing representations typically overlook the influence of past experiences on present preferences. This study develops, applies and tests a hidden Markov model with a discrete choice kernel to model and forecast the evolution of individual preferences and behaviors over long-range forecasting horizons. The hidden states denote different preferences, i.e. modes considered in the choice set and sensitivity to level-of-service attributes. The evolutionary path of those hidden states (preference states) is hypothesized to be a first-order Markov process such that an individual's preferences during a particular time period are dependent on their preferences during the previous time period. The framework is applied to study the evolution of travel mode preferences, or modality styles, over time, in response to a major change in the public transportation system. We use longitudinal travel diary from Santiago, Chile. The dataset consists of four one-week pseudo travel diaries collected before and after the introduction of Transantiago, which was a complete redesign of the public transportation system in the city. Our model identifies four modality styles in the population, labeled as follows: drivers, bus users, bus-metro users, and auto-metro users. The modality styles differ in terms of the travel modes that they consider and their sensitivity to level-of-service attributes (travel time, travel cost, etc.). At the population level, there are significant shifts in the distribution of individuals across modality styles before and after the change in the system, but the distribution is relatively stable in the periods after the change. In general, the proportion of drivers, auto-metro users, and bus-metro users has increased, and the proportion of bus users has decreased. At the individual level, habit formation is found to impact transition probabilities across all modality styles; individuals are more likely to stay in the same modality style over successive time periods than transition to a different modality style. Finally, a comparison between the proposed dynamic framework and comparable static frameworks reveals differences in aggregate forecasts for different policy scenarios, demonstrating the value of the proposed framework for both individual and population-level policy analysis. The aforementioned methodological frameworks comprise complex model formulation. This however comes at a cost in terms.
Author: Cambridge Systematics Publisher: ISBN: Category : Languages : en Pages : 54
Book Description
The purpose of the manual is to provide an introduction to travel forecasting to enable transportation planners and analysts to utilize the UMTA Transportation Planning System (UTPS) effectively.
Author: Surya Nepal Publisher: Springer Nature ISBN: 3030596125 Category : Computers Languages : en Pages : 264
Book Description
This book constitutes the proceedings of the 9th International Conference on Big Data, BigData 2020, held as part of SCF 2020, during September 18-20, 2020. The conference was planned to take place in Honolulu, HI, USA and was changed to a virtual format due to the COVID-19 pandemic. The 16 full and 3 short papers presented were carefully reviewed and selected from 52 submissions. The topics covered are Big Data Architecture, Big Data Modeling, Big Data As A Service, Big Data for Vertical Industries (Government, Healthcare, etc.), Big Data Analytics, Big Data Toolkits, Big Data Open Platforms, Economic Analysis, Big Data for Enterprise Transformation, Big Data in Business Performance Management, Big Data for Business Model Innovations and Analytics, Big Data in Enterprise Management Models and Practices, Big Data in Government Management Models and Practices, and Big Data in Smart Planet Solutions.
Author: Dimitris Potoglou Publisher: Edward Elgar Publishing ISBN: 1839105747 Category : Political Science Languages : en Pages : 537
Book Description
This insightful Handbook offers a comprehensive and diverse understanding of the determinants of travel behaviour, looking at the ways in which it can be better understood, modelled and forecasted. Dimitris Potoglou and Justin Spinney bring together an international range of esteemed academics who explore the origins of the field, research analysis methods, environmental considerations, and social factors. This title contains one or more Open Access chapters.
Author: National Research Council (U.S.). Transportation Research Board Publisher: Transportation Research Board National Research ISBN: Category : Transportation Languages : en Pages : 128
Author: Michael Lechner Publisher: Springer Science & Business Media ISBN: 364257615X Category : Business & Economics Languages : en Pages : 248
Book Description
Empirical measurement of impacts of active labour market programmes has started to become a central task of economic researchers. New improved econometric methods have been developed that will probably influence future empirical work in various other fields of economics as well. This volume contains a selection of original papers from leading experts, among them James J. Heckman, Noble Prize Winner 2000 in economics, addressing these econometric issues at the theoretical and empirical level. The theoretical part contains papers on tight bounds of average treatment effects, instrumental variables estimators, impact measurement with multiple programme options and statistical profiling. The empirical part provides the reader with econometric evaluations of active labour market programmes in Canada, Germany, France, Italy, Slovak Republic and Sweden.
Author: Zhanhong Cheng
Author: Zhanhong Cheng
Author: National Research Council (U.S.). Committee for Determination of the State of the Practice in Metropolitan Area Travel Forecasting
Author: Jinhua Zhao
Author: Feras El Zarwi
Author: Cambridge Systematics
Author: Surya Nepal
Author: Dimitris Potoglou
Author: National Research Council (U.S.). Transportation Research Board
Author: Michael Lechner
Author: