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Chad, <br /> <br />The questions that pop to mind RE single track CTC vs DT ABS: <br /> <br />1. Why go to the bother of ripping out a second parallel line, e.g. why not CTC the double track with crossovers? Keep this hypothetical in that we are assuming no such thing as "over capacity" of past decades, rather that traffic will gravitate toward available capacity. <br /> <br />2. Following up on the idea of CTC DT, instead of using the parallel line as the siding (and temporarily blocking the opposing traffic), do/did/will any railroad that you know of use a short section of 3rd middle track as a "siding" for both tracks? I mean, how likely is it for a a typical corridor that hosts 100+ trains per day that such a middle "siding" would need to be used by both an eastbound and a westbound drag freight at the same time? <br /> <br />Just some dumb questions for an intriguing topic.
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