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[quote user="A.K. Cummings"]Railway Man —  Interesting indeed. Question: What about the eight-mile short line that serves one cannery with a single SW9 that makes five trips a week with six cars at a time to the CSX interchange?[/quote]Actually, I have another question about that... Do lines with only one train operating on them need PTC too? Or is it required just in case the railroad eventually adds another train? PTC doesn't add any level of safety for just one train, except at the interchange, possibly.
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