Menlo Park, California, United States
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I write about how AI agents move from impressive demos into real enterprise…

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Publications

  • A novel agent-based transportation model of a university campus with application to quantifying the environmental cost of parking search

    Transportation Research Part A: Policy and Practice

    This paper develops a novel agent-based transportation model of a university campus,
    primarily focusing on vehicle-related travel and the associated parking search process. In
    developing and validating the model, the study uses a wide range of data sources
    including:(1) a brief “trip-diary” type survey;(2) 24-h traffic counts at the entry and exit points
    to the campus;(3) information about the university buildings' class room capacities and class
    schedules;(4) parking…

    This paper develops a novel agent-based transportation model of a university campus,
    primarily focusing on vehicle-related travel and the associated parking search process. In
    developing and validating the model, the study uses a wide range of data sources
    including:(1) a brief “trip-diary” type survey;(2) 24-h traffic counts at the entry and exit points
    to the campus;(3) information about the university buildings' class room capacities and class
    schedules;(4) parking occupancy surveys; and (5) select intersections' turn movement ...

    See publication
  • An integrated traffic-driving simulation framework: Design, implementation, and validation

    Transportation Research Part C: Emerging Technologies

    Abstract This paper first describes the process of integrating two distinct transportation
    simulation platforms, Traffic Simulation models and Driving Simulators, so as to broaden the
    range of applications for which either type of simulator is applicable. To integrate the two
    distinct simulation platforms, several technical challenges needed to be overcome including
    reconciling differences in update frequency, coordinate systems, and the fidelity levels of the
    vehicle…

    Abstract This paper first describes the process of integrating two distinct transportation
    simulation platforms, Traffic Simulation models and Driving Simulators, so as to broaden the
    range of applications for which either type of simulator is applicable. To integrate the two
    distinct simulation platforms, several technical challenges needed to be overcome including
    reconciling differences in update frequency, coordinate systems, and the fidelity levels of the
    vehicle dynamics models and graphical rendering requirements of the two simulators. ...

    See publication
  • On-line prediction of border crossing traffic using an enhanced Spinning Network method

    Transportation Research Part C: Emerging Technologies

    Abstract This paper improves on the Spinning Network (SPN) method, a novel forecasting
    technique, inspired by human memory which was recently developed by Huang and Sadek
    (2009). The improvement centers on the use of the Dynamic Time Warping (DTW) algorithm
    to assess the similarity between two given time series, instead of using the Euclidean
    Distance as was the case with the original SPN. Following this, the enhanced method (ie,
    hereafter referred to as the DTW–SPN) is used…

    Abstract This paper improves on the Spinning Network (SPN) method, a novel forecasting
    technique, inspired by human memory which was recently developed by Huang and Sadek
    (2009). The improvement centers on the use of the Dynamic Time Warping (DTW) algorithm
    to assess the similarity between two given time series, instead of using the Euclidean
    Distance as was the case with the original SPN. Following this, the enhanced method (ie,
    hereafter referred to as the DTW–SPN) is used to predict hourly traffic volumes at the ...

    See publication
  • An evaluation of environmental benefits of time-dependent green routing in the greater Buffalo–Niagara region

    Journal of Intelligent Transportation Systems

    This article conducts a realistic assessment, using a real-world case study, of the likely
    environmental benefits of an intelligent transportation systems (ITS) strategy that provides
    dynamic route guidance to travelers based on the lowest emission or fuel consumption
    routes. Several features distinguish this study from previous reported research. First, the
    research utilizes a realistic case study of a medium-sized metropolitan area in the United
    States. Second, the…

    This article conducts a realistic assessment, using a real-world case study, of the likely
    environmental benefits of an intelligent transportation systems (ITS) strategy that provides
    dynamic route guidance to travelers based on the lowest emission or fuel consumption
    routes. Several features distinguish this study from previous reported research. First, the
    research utilizes a realistic case study of a medium-sized metropolitan area in the United
    States. Second, the research applies the latest state-of-the-art models on both the ...

    See publication
  • Modeling parking behavior under uncertainty: a static game theoretic versus a sequential neo-additive capacity modeling approach

    Networks and Spatial Economics

    Abstract This paper proposes two types of parking choice models, a static game theoretic
    model and a dynamic neo-additive capacity model, to capture the competition among drivers
    for limited desirable parking spaces. The static game assumes that drives make decisions
    simultaneously and with perfect knowledge about the characteristics of the parking system
    and the strategies of their fellow drivers in the system; the model thus captures only the
    rational aspect of parking…

    Abstract This paper proposes two types of parking choice models, a static game theoretic
    model and a dynamic neo-additive capacity model, to capture the competition among drivers
    for limited desirable parking spaces. The static game assumes that drives make decisions
    simultaneously and with perfect knowledge about the characteristics of the parking system
    and the strategies of their fellow drivers in the system; the model thus captures only the
    rational aspect of parking choice behavior and pays no attention to modeling individual ...

    See publication
  • A Computational‐Based Approach to Estimating Travel Demand in Large‐Scale Microscopic Traffic Simulation Models

    Journal of Computing in Civil Engineering

    The increased interest in the development and application of large-scale or
    regional microsimulation transportation models has brought to the forefront the challenges
    associated with estimating the dynamic demand information needed to run such models.
    This paper develops a computational-based approach for estimating or adjusting dynamic
    origin–destination matrices for regional microsimulation models on the basis of hourly traffic
    counts. The proposed approach, while based on…

    The increased interest in the development and application of large-scale or
    regional microsimulation transportation models has brought to the forefront the challenges
    associated with estimating the dynamic demand information needed to run such models.
    This paper develops a computational-based approach for estimating or adjusting dynamic
    origin–destination matrices for regional microsimulation models on the basis of hourly traffic
    counts. The proposed approach, while based on genetic algorithms (GA), includes a ...

    See publication
  • Artificial Intelligence and Microscopic Traffic Simulation Models: Applications to Parameter Calibration and Origin–Destination Estimation

    Transportation Research E-Circular

    Abstract: In recent years, the use of microscopic traffic simulation (microsimulation hereafter)
    has become increasingly popular in transportation modeling. After creating a crude
    microsimulation model, an indispensible task is to tune up the model so it can accurately
    represent the real data. This task can be divided into two sub-tasks, namely parameter
    calibration, ie, to adjust the parameter values of the model, and origin–destination estimation
    (ODE), ie, to adjust the…

    Abstract: In recent years, the use of microscopic traffic simulation (microsimulation hereafter)
    has become increasingly popular in transportation modeling. After creating a crude
    microsimulation model, an indispensible task is to tune up the model so it can accurately
    represent the real data. This task can be divided into two sub-tasks, namely parameter
    calibration, ie, to adjust the parameter values of the model, and origin–destination estimation
    (ODE), ie, to adjust the origin–destination (OD) matrices representing the travel demand ...

    See publication
  • Assessing the mobility and environmental benefits of reservation-based intelligent intersections using an integrated simulator

    IEEE Transaction on Intelligent Transportation Systems

    The connected vehicle research program is a mul-timodal research initiative in the
    US that envisions a fully connected transportation system with wireless communications
    linking vehicles, the infrastructure, and handheld smart devices. This paper designs and
    evaluates a reservation-based approach to intersection control that is designed to take full
    advantage of the unprecedented connectivity that the connected vehicle initiative promises
    to provide. The control approach…

    The connected vehicle research program is a mul-timodal research initiative in the
    US that envisions a fully connected transportation system with wireless communications
    linking vehicles, the infrastructure, and handheld smart devices. This paper designs and
    evaluates a reservation-based approach to intersection control that is designed to take full
    advantage of the unprecedented connectivity that the connected vehicle initiative promises
    to provide. The control approach, which is referred to herein as the “intelligent intersection ...

    See publication
  • Dynamic demand estimation and microscopic traffic simulation of a university campus transportation network

    Transportation Planning and Technology

    This article documents the authors' experience with the modeling, simulation, and
    analysis of a university transportation system, using the TRansportation ANalysis and
    SIMulation System (TRANSIMS). The processes of data preparation and network coding are
    described, followed by the algorithm developed to estimate the dynamic 24-hour demand,
    which includes a procedure for estimating the 'desirability'of the different parking lots from
    readily available data. The dynamic demand…

    This article documents the authors' experience with the modeling, simulation, and
    analysis of a university transportation system, using the TRansportation ANalysis and
    SIMulation System (TRANSIMS). The processes of data preparation and network coding are
    described, followed by the algorithm developed to estimate the dynamic 24-hour demand,
    which includes a procedure for estimating the 'desirability'of the different parking lots from
    readily available data. The dynamic demand estimation algorithm is validated by ...

    See publication
  • Next-generation transportation simulation and modeling tools

    State University of New York at Buffalo

    The purpose of this doctoral study is to advance the state of the art of the simulation
    and modeling of transportation systems by addressing some of the limitations of state-of-the-
    practice models such as the inability to deal with large amounts of data in real-time, the
    aggregate nature of the majority of models, the lack of network realism in driving simulation
    and human behavior realism in traffic simulation, and finally the inability to evaluate new and
    emerging…

    The purpose of this doctoral study is to advance the state of the art of the simulation
    and modeling of transportation systems by addressing some of the limitations of state-of-the-
    practice models such as the inability to deal with large amounts of data in real-time, the
    aggregate nature of the majority of models, the lack of network realism in driving simulation
    and human behavior realism in traffic simulation, and finally the inability to evaluate new and
    emerging Intelligent Transportation Systems (ITS) applications. Within this broader ...

    See publication
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Honors & Awards

  • New York Upstate Young Transportation Professional of the Year

    Institute of Transportation Engineers

    ITE Transportation Achievement Awards

  • Upstate New York Outstanding Intelligent Transportation Systems Project of the Year

    Intelligent Transporation Society of New York

    Designed and implemented a traveler information system www.mynittec.org.

  • Freshman Scholarship

    Tsinghua University

    3rd-place, National College Entrance Exam (Science and Technology category), Fujian Province, China

Languages

  • English

    Full professional proficiency

  • Chinese

    Native or bilingual proficiency

  • Japanese

    Elementary proficiency

Organizations

  • Standing Committee on Artificial Intelligence and Advanced Computing Application, Transportation Research Board, National Academies

    Main Member

    -

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