Truck Tour-Based Model for Spatial Disaggregation of California Freight Demand

Freight transportation encompasses the movement of a wide variety of commodities as well as commercial vehicles on the freight infrastructure, linked to socioeconomic condition and polices. Throughout the history of transportation research, the concept that freight movement is responsible for a large share of the diverse problems in transportation has been accepted, but widespread concerns about environmental impacts such as air pollution, noise, and safety have led to a renaissance of new freight related research. In the same vein, the role of statewide freighting forecast models has been expanded into much finer levels of analysis than the county level. In partnership with state agencies and Metropolitan Planning Organizations (MPOs), the California Department of Transportation (Caltrans) is currently developing a California Statewide Freight Forecasting Model (CSFFM). A critical challenge is to provide a framework for organic integration between the CSFFM and a finer spatial level of models to meet MPO needs. However, factoring methods are currently largely used for disaggregating freight demand. Such methods cannot adequately capture the complex structure and behavior of freight movements, advances in logistics, information technology, and relocating infrastructure at the MPO level. One advantage of the CSFFM, modal path-based origin-destination (OD) representation, cannot be fully utilized by MPOs because factoring methods tend to break the chains of modal path-based information in the conversion to trip-based information. This research will explore and develop truck tour-based models for disaggregating California Statewide Freight Demand from an aggregate Freight Analysis Zone (FAZ) level to the more disaggregateTraffic Analysis Zone (TAZ) level, by using truck global positioning data (GPS) data. Expected results include new and improved insights into the spatial and temporal operations of trucks at the urban and MPO level, contribution to the statewide-related component of urban freight modeling, and an evaluation of traffic and environmental impacts of state-level policies and air pollution mitigation strategies.


    • English


    • Status: Active
    • Contract Numbers:


    • Sponsor Organizations:

      Department of Transportation

      Office of the Secretary
      1200 New Jersey Avenue, S.E.
      Washington, DC    20590
    • Performing Organizations:

      University of California, Irvine

      Institute of Transportation Studies
      Irvine, CA  USA  92697
    • Principal Investigators:

      Ritchie, Stephen

    • Start Date: 20120801
    • Source Data: RiP Project 33503

    Subject/Index Terms

    Filing Info

    • Accession Number: 01471030
    • Record Type: Research project
    • Source Agency: University of California Transportation Center
    • Contract Numbers: 7869
    • Files: UTC, RiP
    • Created Date: Jan 31 2013 1:01AM