Abstract

This research presents a methodology for estimating freight flows along corridors serving international trade. A methodology for disaggregating regional flows from the FHWA Freight Analysis Framework (FAF3) to the state level was developed and applied to the state of Texas. To keep international trade moving in a timely and efficient manner, it is important to have accurate information identifying and anticipating capacity shortfalls and congestion nodes. As trade levels increase, the strain on existing infrastructure serving international trade only worsens; therefore, this information is important for improving strategic investment decisions. Findings from the literature are presented about the FAF3 structure and existing methodologies to estimate freight flows at statewide and regional levels. A methodology was developed to disaggregate national FAF3 data and then to assign and estimate the tons of international freight flows through statewide roadways and railroads. The international trade corridors in Texas are used as a case study to apply the methodology and estimate current and future freight demand. Results from the case study demonstrate encouraging findings about this methodology. Conclusions and recommendations to refine and improve this methodology and the FAF3 are provided.

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