United States Department of Transportation
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DOTD Support for UTC Project: A Simulation Model for Intermodal Freight Transportation in Louisiana: Research Project Capsule
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2014-02-01
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By Kelle, Peter
[PDF-145.49 KB]
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Alternative Title:DOTD Support for UTC Project: A Simulation Model for Intermodal Freight Transportation in Louisiana
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Abstract:The new Moving Ahead for Progress in the 21st Century ACT (MAP-21) asks all state departments of transportation (DOT's) to evaluate and improve the operation and maintenance of their freight networks. Because of the high complexity and high variability involved in transportation flows, it is technically difficult to use analytical models to evaluate intermodal freight networks and identify improvement areas. Therefore, a simulation model is proposed to include the links and nodes of all three surface modes and the connections between different modes. In the literature and practice, the capacity and volume/speed relationships are only well defined for some infrastructure in a single mode, such as highway links, dams and ports, or rail links. There are no simulation models that incorporate the capacity at intermodal connections and the nonlinear dwelling time versus volume relationships at connections though most freight flow time is spent at the connection nodes between modes or within modes (e.g., classification yards or ports). Those intermodal connection points are often bottlenecks for the capacity of the overall freight network. The freight transportation network is an integrated system with various impacts on the society. In addition to mobility, the intermodal simulation model should also incorporate other transportation performance metrics such as reliability, safety and security, environmental impact, economic development, etc. The proposed simulation model is expected to incorporate performance metrics that will be identified by an ongoing project of "Development of Performance Measurement for Freight Transportation" funded by the National Center for Intermodal Transportation for Economic Competitiveness (NCITEC) and the Louisiana Department of Transportation and Development (LADOTD).
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