Performance Measures for Freight Transportation (2011) / Chapter Skim
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Pages 32-36
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From page 32... ...
The few states that included freight performance measures in their performance reporting suites typically had fewer than four freight measures. The measures tended to be captured from existing data sources.
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From page 33... ...
AASHTO's Standing Committee on Performance Management supports a website linking performance reports or annual reports to 41 state transportation agencies. Although not definitive, the links indicated that more than 50 percent of the states produced some kind of performance reports.
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From page 34... ...
It was noticeable that no two states had the same measures, and in most cases there were wide differences in the metrics. Although states reported freight performance metrics, most of the metrics were not used to calibrate performance of specific state programs.
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From page 35... ...
to F (worst) based on measures of effectiveness 11 Traffic Volume Annual average daily traffic, peak-hour traffic, or peak-period traffic 11 Vehicle-Miles Traveled Volume times length 10 Travel Time Distance divided by speed 8 Speed Distance divided by travel time 7 Incidents Traffic interruption caused by crash or other unscheduled event 6 Duration of Congestion Period of congestion 5 Percent of System Congested Percent of miles congested (usually defined based on LOS E or F)
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From page 36... ...
Most of the measures appear to be indicators of broad trends of overall transportation system performance. The Iowa DOT freight-related performance measures include highway crash rates per million vehicle miles for large trucks, total crashes at rail–highway crossings, and railroad derailments per million ton-miles.5 Freight efficiency measures include the percentage of Iowa rail carriers earning a reasonable return on investment and average rail revenue per ton-mile.
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