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34 corridors were likely a contributing factor to state efforts to interstate motor carrier mileage; percentage of satisfied improve overall travel times. However, it appeared to be rare motor carriers; and customer satisfaction with timeliness of that state DOT freight performance measurement was used Motor Carrier Services response. The customer satisfaction to make frequent decisions. Most of the measures appear to ratings focus on users' satisfaction with service received by be indicators of broad trends of overall transportation system the Motor Carrier Services office. performance. The Iowa DOT freight-related performance measures Relevance of the Public- include highway crash rates per million vehicle miles for large Sector Experience trucks, total crashes at railhighway crossings, and railroad derailments per million ton-miles.5 Freight efficiency mea- A significantly more detailed discussion of the public- sures include the percentage of Iowa rail carriers earning a sector use of freight performance measures is included in reasonable return on investment and average rail revenue per Appendices C and D. The summary of that review indicates ton-mile. The quality-of-life performance measures iden- that widespread use of freight performance measures is not tify approximate travel times to major external markets in common. A consensus as to which freight measures should the Midwest Region, percentage of railroad track-miles able be adopted was not apparent from a review of the measures to handle 286,000-pound cars, percentage of railroad track- states were using. An AASHTO task force on examining miles able to operate at 30 miles per hour or more, and rail freight performance measures recommended three mea- fuel use per ton-mile. sures: travel speeds on the freight-significant routes; reliabil- Washington State DOT's Grey Book includes a handful of ity on freight-significant routes; and border crossing delay. freight performance measures. It reports upon truck vol- Although those three are important, they fall far short of the umes on state highways, the number of truck border cross- expansive objective of this research, that is, to have a com- ings, rail freight tonnage, and container shipments through prehensive set of measures that examines multiple aspects of state ports. freight performance for all modes. The Missouri DOT Tracker includes 111 measures, of Chapter 4 summarizes the types of freight performance which five relate to freight: freight tonnage by mode; percent- data available to support a performance measurement age of trucks using advanced technology at weigh s tations; framework. Endnotes 3PBS&J. NCHRP Synthesis 311: Performance Measures of Operational Effec- tiveness for Highway Segments and Systems. Transportation Research Board 1 Osborne, David, and Ted Gaebler. Reinventing Government: How the Entre- of the National Academies, Washington, D.C., 2003. preneurial Spirit Is Transforming the Public Sector, Addison-Wesley, Reading, 4 Cambridge Systematics, Inc., PB Consult, and Texas Transportation Insti- Mass., 1992, pp. 147154. tute. NCHRP Report 551: Performance Measures and Targets for Transpor- 2 Poister, Theodore H. "Performance Measurement in Transportation: State tation Asset Management. Transportation Research Board of the National of the Practice." Conference Proceedings 36: Performance Measures to Improve Academies, Washington, D.C., 2006. Transportation Systems--Summary of the Second National Conference, 2004, 5 Iowa DOT, Performance Measures for Iowa Transportation Systems, 2006. pp. 79, 8586. Prepared by Iowa State University, Center for Transportation Research and Education.