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Measuring International Trade on U.S. Highways
Rolf Schmidt, Federal Highway Administration, “Freight Analysis Framework and Ton-Miles of International Trade Traffic”
Abstract: Bruce Lambert gave a presentation on the Freight Analysis Framework (FAF), which was created to understand the magnitude and geography of freight moving on the nation’s transportation system, to develop a tool to evaluate emerging congestion, and to support reauthorization policy analysis. The FAF is a synthesis of diverse data from BTS, Army Corps, Reebie Truck, Rail Waybill Sample, etc., working across modes, to develop a better understanding of emerging logistics and various trade and transportation issues. The current products are a commodity database, a highway capacity database, and maps of freight activity for the nation, states, and selected metro areas.
Irwin Silberman, Bureau of Transportation Statistics, “Conceptual Underpinnings of Ton-Miles and Value-Miles”
Abstract: Silberman discussed the advantages and current uses of information on ton-miles. The strength is the combination in the statistic of two essential elements of transportation service, distance and quantity. Tonnage absent distance has the disadvantages of the possibility of double counting and the importance of the distance a load travels. Value-miles seem somewhat less useful as in discriminating since high value goods are most likely to be transported by air.
Frank Southworth, Senior R&D Staff, Oak Ridge National Laboratory, “Missing Pieces in Ton-Mile Estimation and ORNL Highway Network”
Abstract: This presentation added greater detail to the workings of the flow assignment model described by Hwang. The primary step involves selection of the most likely origin-destination paths through the ORNL multimodal network, using either a least impedance path model or a logit-based weighted distance average. The presentation also included the sources of uncertainty of the distance calculations.
Rob Tardif, Ontario Ministry of Transportation, “Measuring Highway Freight Traffic in Canada”
Abstract: This presentation discussed a variety of datasets that are used to help measure highway freight traffic in Canada. They include the Canadian Vehicle Survey and trade data.