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Michael: <br /> <br />The STB Performance Measures can be found on their website. They were instituted following merger problems so that the STB and others had a consistent and comparable way to measure railroad fluidity. We reported this in Trains. <br /> <br />The source material cited in the Map of the Month in April 2003 Trains includes "Class I railroads." That means we work with them, in this case to develop the criteria and decide which of the yards qualified, and which didn't. This is why it is important that any document reliant on qualified facts cite its sources, rather than leaving them unknown. It's pretty time-consuming doing this. The typical Map of the Month requires about 30 hours of staff time just to obtain, verify, and make sense of the source data. The illustrator's time is on top of this. Map of the Month is consistently the most expensive two pages in the magazine. <br /> <br />Your example, Oakwood Yard, is not considered by NS to be a system classification yard. NS considers it a regional yard. System yards by definition classify cars received from AND delivered to locations distant from the yard. Oakwood does this only on one end, which makes it a local yard. Also, in total daily cars processed, it's small compared to the NS system yards listed. <br /> <br />No yard in Detroit qualifies as a system yard. <br /> <br />By the way, we're working on a Trackside Guide for Detroit for the June 2003 issue. <br /> <br />Mark W. Hemphill
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