Advanced Transit Vehicle Modal Emissions Model for Optimizing Transit System Operations

Properly estimating transit energy use is a critical element of transit system planning. Reasonable predictions of energy consumption are needed by transit agencies and stakeholders to select proper fleet, arrange vehicle operations, develop improvement plans, etc. However, the current models used to estimate transit energy use at the vehicle level are quite limited, in part because few models were specifically designed for transit systems. Current energy models may fail to capture some key operation elements such as stop frequency and passenger load (“over-simplify”), or asking for input or configuration information which is too difficult for most people to obtain (“over-specify”). In this research effort, the research team classifies all the potential models used for estimating vehicle energy and will develop a hybrid model to estimate transit vehicle energy consumption based on system knowledge and realworld observational data. The model is expected to take affordable and easy-to-collect vehicle specification and engine and on-road operation condition data as inputs, include vehicle registration data, GPS position and speed data, OBD engine parameter data, and road grade data from the USGS Digital Elevation Model (DEM). The proposed new vehicle emission modeling framework will be verified and calibrated using local transit data. Finally, the proposed modeling approach will be applied to improve current transit vehicle operation and reduce transit fuel use in the MARTA fleet. The new emission modeling approach is expected to better estimate energy consumption and emissions of transit vehicles, and provide more effective eco-transit approach for real-world transit operations.

Language

  • English

Project

  • Status: Completed
  • Funding: $60000
  • Contract Numbers:

    69A3551747114

  • Sponsor Organizations:

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    Georgia Transportation Institute University Transportation Center (GTI-UTC)

    Georgia Institute of Technology
    790 Atlantic Drive
    Atlanta, GA  United States  30332

    Georgia Institute of Technology, Atlanta

    790 Atlantic Drive
    Atlanta, GA  United States  30332-0355

    Georgia Institute of Technology, Atlanta

    School of Civil and Environmental Engineering
    790 Atlantic Drive
    Atlanta, GA  United States  30332-0355
  • Project Managers:

    lacobucci, Lauren

  • Performing Organizations:

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    Georgia Institute of Technology, Savannah

    School of Civil and Environmental Engineering
    210 Technology Circle
    Savannah, GA  United States  31407
  • Principal Investigators:

    Xu, Xiaodan

  • Start Date: 20180401
  • Expected Completion Date: 20190531
  • Actual Completion Date: 20191031
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01709653
  • Record Type: Research project
  • Source Agency: National Center for Sustainable Transportation
  • Contract Numbers: 69A3551747114
  • Files: UTC, RiP
  • Created Date: Jun 28 2019 1:43PM