Vassilis Papayannoulis, PhD

Transportation Planning Group Manager

Langan Engineering


  • 1989: PhD, Transportation Planning/Engineering
    Polytechnic University, NY
  • 1986: MS, Transportation Planning/Engineering
    Polytechnic University,
  • 1985: MS, Highway and Transportation Engineering
    University of Birmingham, UK
  • 1984: BS, Civil Engineering
    National Technical University of Athens, Greece

Professional History

  • August 2013-Present: Transportation Planning Group Manager
    Langan Engineering, New York, NY
  • November 2012-August 2013: Affiliate
    IBI Group, New York, NY
  • March 2012-October 2012: Regional Manager, Transportation Planning
    IBI Group
  • 2008-October 2011: Principal
    Cambridge Systematics, New York, NY
  • 1990 –2008: Sr. Vice President
    Urbitran Associates, New York, NY
  • 1986-1989: Research Engineer
    Transportation Training Research Center (TTRC), East Liberty, OH

Project Experience

  • San Francisco County Transportation Authority (SFCTA)
    Dynamic Traffic Assignment (DTA) Peer Review Panel
  • Port Authority of NY & NJ (PANYNJ)
    The Customized Evacuation and Recovery Modeling and Simulation Tool (CMST)
  • New York City Department of Transportation (NYCDOT)
    Sheridan Planning Study
  • New York Metropolitan Transportation Council (NYMTC)
    Website Improvement and Maintenance
    Manhattan Traffic Model
  • Federal Highway Administration (FHWA)
    Integrated Corridor Management Tools, Strategies, and Deployment Support
  • North Jersey Transportation Planning Authority (NJTPA)
    Performance Results, Assessing the Impacts of Transportation Projects
    Long Term Ridership Forecast
    TAZ/Socioeconomic Web Application
    Development of Regional Safety Priorities Update, Phase 2
  • Bronx Arterial Needs
    Major Investment Study

Selected Publications

  • Pre-Trip and En-Route Multi-Modal Travel Decisions Considering Habitual Travel Times under Unexpected Incident Scenarios. Presented at the 2011 14th International IEEE Conference on Intelligent Transportation Systems - (ITSC 2011), with Brenda Bustillos and Yi-Chang Chiu.
  • An Integrated Travel Demand, Mesoscopic and Microscopic Modeling Platform to Assess Traffic Operations for Manhattan, New York. Abstract presented at the 13th Application of Planning Methods Conference, 2011, with J. Strasser, M. Marsico, T. Maguire and S. Scalici.
  • A Primer for Dynamic Assignment ADB30 Transportation Network Modeling Committee, 2010 – Practitioner Reviewer Development of a Toll Plaza Delay. Estimation methodology for use in the Travel demand Model Post Processor. Submitted for presentation/publication to the Transportation Research Board (TRB) Annual Meeting, 2009, with M. Acin, K. Kiskel and G. Davies.
  • Safety-Conscious Planning in Practice: Development of Regional Safety Planning and Policy Priorities. Transportation Research Record 1969, with L. Goldman, S. Herbal and G. Davies.
  • A Microscopic Traffic Simulation Model of West Midtown Manhattan. Proceedings of the Transportation Research Board (TRB) Annual Meeting, 2004 and of the 9th Application of Planning Methods Conference, 2003, with J. Donnelly, J. McMillan, and T. Jester.

Dr. Vassilis Papayannoulis has 28 years of experience, and before joining IBI Group he was a Principal and the Travel Demand Forecasting Regional Manager for the New York Office of Cambridge Systematics (CS). From 1990 to 2008, he worked at Urbitran Associates, Inc. (UAI), where as a Senior Vice President he directed the Transportation Modeling group. Dr. Papayannoulis's expertise includes travel demand forecasting, traffic operation simulation, database management systems, safety, system performance measures, software development and Geographic Information Systems (GIS). He has also taught transportation courses at Polytechnic University and City College, in New York City.

Dr. Papayannoulis has been involved in a number of travel demand models including the New York Metropolitan Transportation Council Best Practice Model, which was one of the first activity based models in the nation. Because of his technical knowledge and indepth understanding of the issues related to traffic simulation, he has also been engaged in the development of numerous large scale and complex models, including models addressing special events. Currently his technical focus has shifted to mesoscopic models, Dynamic Traffic Assignment (DTA) and real-time data. He was the technical lead for the Minneapolis and Dallas Integrated Corridor Management (ICM) Pioneer sites, where DTA models were utilized to assess ITS technologies for Incident Management and guidelines for Performance Measures utilizing outputs from mesoscopic traffic simulation models were developed. Also he was the Project Manager for NYCDOT’s Manhattan Traffic Model, where a platform supporting corridor management planning, design and operations based on a multi-resolution model (interfacing travel demand, DTA (mesoscopic) and microscopic simulation models) was developed. Most recently Dr. Papayannoulis participated in the Peer Review Panel for San Francisco County Transportation Authority (SFCTA) DTA project.

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